Dissertations / Theses on the topic 'Biodiversity indicator'
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Uliczka, Helen. "Forest biodiversity maintenance : instruments and indicators in the policy implementation /." Uppsala : Dept. of Conservation Biology, Swedish Univ. of Agricultural Sciences, 2003. http://epsilon.slu.se/s291.pdf.
Full textPaillet, Yoan. "Les microhabitats des arbres : facteurs d'influence, lien avec la biodiversité et potentiel indicateur." Thesis, Paris, Muséum national d'histoire naturelle, 2018. http://www.theses.fr/2018MNHN0028/document.
Full textAn indicator is a tool to measure metrics or phenomenons too complex or costly to measure directly. In the case of biodiversity, indicators are essential regarding the complexity to assess species state and dynamics. In forest, tree microhabitats (e.g.cavities, cracks in the wood, conks of lignicolous fungi) have been recently considered as a potential biodiversity indicator, with a more specific focus than other structures like deadwood volume. However, scientific references linking tree microhabitat metrics and biodiversity measures are still rare, and limited to a few taxonomic groups. More generally, like other indicators, the validation process of microhabitats as biodiversity indicators is not standardized. This ph-d thesis contributes to this validation and adresses three aspects included in an indicator validation process. The main aims were to: (i) Quantify and reduce incertitudes on tree microhabitat inventories. We thus proposed a first reference typology to standardize and homogenize microhabitats inventories. This typology has a hierarchical and evolutive structure, which allows its use in different contexts and for different purposes. We also quantified the potential bias linked to observer effects, in order to better take it into account in future inventories ; (ii) Better understand the influence of different factors on tree microhabitats at two different scales. At the tree scale, through the analysis of a national database, we generalized the relationships between tree characteristics (species, diameter, vitality) and number and occurrence of tree microhabitats. At the stand scale, we analysed the densities and types of microhabitat-bearing trees on an enlarged forest management gradient, comparing strict reserves and managed forests. These two studies evidenced the crucial role of large trees and snags in the provision of tree microhabitats ; (iii) Link tree microhabitats with the biodiversity of three taxonomic groups through the framework of structural equation models. We showed that microhabitats mediate the effects of management abandonment and old-growth forest features (large living and dead trees) on the biodiversity of birds and bats, and to a lesser extent on saproxylic beetles. In the end, tree microhabitat are not a universal biodiversity indicator but have a complementary role compared to other forest structures traditionally used to assess biodiversity. This ph-d thesis specifies the role of tree microhabitats as biodiversity indicators and proposes further research to continue validating them as such
Clergué, Boris. "Évaluation de l'impact des pratiques agricoles sur les fonctions de la biodiversité à l'aide d'indicateurs agri-environnementaux : approche globale et développement d'un indicateur de "résistance aux stress biotiques"." Thesis, Vandoeuvre-les-Nancy, INPL, 2008. http://www.theses.fr/2008INPL048N/document.
Full textRelevant tools for assessment are necessary to evaluate the impact of agricultural pratices on the functions provided by biodiversity at the plot scale to the landscape scale. The goal and the innovation of this work has been to explore a new method of creation of an assessment tool of the biodiversity functions. We have chosen like assessment method the agri-environmental indicators, which make it possible to evaluate the impact of agricultural practices on environment compartments (water, soil, air, fauna and flora) and help to decision-making. We thus propose a general architecture of an indicator of functional biodiversity and the detail of an agronomic function indicator of importance: resistance to the biotic stresses. Within this indicator, an under-indicator is: the « role of the terrestrial auxiliaries ». Carabids will be used as model auxiliary for the construction of this under-indicator. Two building methods of indicators are compared: a method with expert saying and a method with data mining, this second method representing an innovation of the thesis. The results of these methods are then compared with field datas leads on the Vittel territory. Field datas related to the follow-up of the carabid populations and the organization of the agricultural landscape. A treatment by a geographical information system allowed the validation of the indicators obtained
Roberge, Jean-Michel. "Umbrella species as a conservation planning tool : an assessment using resident birds in hemiboreal and boreal forests /." Uppsala : Dept. of Conservation Biology, Swedish University of Agricultural Sciences, 2006. http://epsilon.slu.se/200684.pdf.
Full textHaneji, Choshin, Van Tu Do, Duc Loi Vu, and Tuan Hung Duong. "Composing biodiversity indicators for the conservation of mangrove ecosystem in Xuan Thuy National Park, Vietnam." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-190317.
Full textDựa trên các chỉ thị được gợi ý từ Công ước về Đa dạng sinh học, các chỉ thị đa dạng sinh học phục vụ công tác bảo tồn các hệ sinh thái rừng ngập mặn của Vườn Quốc gia Xuân Thủy đã được xây dựng, có tính đến các yếu tố môi trường, sinh học và con người. Các yếu tố môi trường, sinh học và con người có liên quan, được xác định bằng việc tổng hợp và đánh giá các tài liệu và các đợt điều tra ngoài thực địa, dưới trật tự các nhóm Áp lực, Tình trạng, Lợi ích và Đáp ứng theo hướng dẫn của Đối tác chỉ thị đa dạng sinh học. Hơn thế nữa, các mối quan hệ liên kết giữa các chỉ thị đã được xác định nhằm quan trắc hiệu quả đa dạng sinh học ở Vườn Quốc gia Xuân Thủy
Sevin, Jennifer Ann. "Protecting biodiversity through monitoring of management indicator species questioning designations of Ursus americanus (black bear) and Plethodon jordani (Jordan's salamander) /." Connect to this title online, 2003. http://www.lib.ncsu.edu/theses/available/etd-11062003-155421/unrestricted/etd.pdf.
Full textVan, Frank Gaëlle. "Gestion participative de la diversité cultivée et création de mélanges diversifiés de blé tendre à la ferme." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLS525/document.
Full textThe transition from a diversified agriculture to a productivist system has led to a decline in cultivated diversity and raises many environmental, societal and health issues. Alternatives such as agro-ecology have emerged, based in particular on the enhancement of agro-biodiversity and genetic diversity within agro-ecosystems. Considering that there are no varieties adapted to their needs in the catalogue, farmers and facilitators from the Réseau Semences Paysannes (RSP) have been conducting a participatory breeding project (PPB) for bread wheat since 2006, in collaboration with the DEAP (Diversity, Evolution and Adaptation of Populations) team at UMR GQE Le Moulon. These farmers are mobilizing diversity to select populations adapted to their practices, terroir and outlets, with the aim of regaining their seed autonomy and a coherence of their system. My thesis focuses on the study of the impacts of collective management and peasant selection practices on wheat crop diversity and population adaptation. It aims to propose possible adaptation of existing PPB practices and to support the implementation of new projects. The impacts of on-farm creation and selection practices of population mixtures on their agronomic and morphological behaviour were evaluated through an experiment in collaboration with about fifteen farmers and facilitators from the RSP. In a second part we studied the impacts of natural selection and peasant selection on the evolution of populations, their stability and adaptation to environments during the wheat PPB project. Then a prospective study on the impacts of the adoption of heterogeneous varieties on cultivated diversity at the landscape level was conducted, by assessing the diversity of populations from PPB, simulating adoption of heterogeneous varieties scenarii and using cultivated diversity indicators. Finally, the impacts of the on-farm experimental design parameters on the adjustment and accuracy of estimates from Bayesian models were assessed, to improve our ability to detect significant differences between populations and to provide recommendations for other decentralized variety evaluation projects using the designs and models developed in the French wheat PPB project
Pettersson, Kristin. "Naturvärdesbedömning av naturreservatet Blänkabacken, i Örebro kommun : Inventering av signalarter med fokus på mossor och lavar som indikerar höga naturvärden i skogsmiljöer." Thesis, Högskolan i Skövde, Institutionen för vård och natur, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-5380.
Full textHaneji, Choshin, Van Tu Do, Duc Loi Vu, and Tuan Hung Duong. "Composing biodiversity indicators for the conservation of mangrove ecosystem in Xuan Thuy National Park, Vietnam: Research article." Technische Universität Dresden, 2014. https://tud.qucosa.de/id/qucosa%3A29077.
Full textDựa trên các chỉ thị được gợi ý từ Công ước về Đa dạng sinh học, các chỉ thị đa dạng sinh học phục vụ công tác bảo tồn các hệ sinh thái rừng ngập mặn của Vườn Quốc gia Xuân Thủy đã được xây dựng, có tính đến các yếu tố môi trường, sinh học và con người. Các yếu tố môi trường, sinh học và con người có liên quan, được xác định bằng việc tổng hợp và đánh giá các tài liệu và các đợt điều tra ngoài thực địa, dưới trật tự các nhóm Áp lực, Tình trạng, Lợi ích và Đáp ứng theo hướng dẫn của Đối tác chỉ thị đa dạng sinh học. Hơn thế nữa, các mối quan hệ liên kết giữa các chỉ thị đã được xác định nhằm quan trắc hiệu quả đa dạng sinh học ở Vườn Quốc gia Xuân Thủy.
Teillard, d'Eyry Félix. "Reconciling food production and biodiversity in farmlands : the role of agricultural intensity and its spatial allocation." Phd thesis, Université René Descartes - Paris V, 2012. http://tel.archives-ouvertes.fr/tel-00766882.
Full textBerglund, Håkan. "Biodiversity in fragmented boreal forests : assessing the past, the present and the future." Doctoral thesis, Umeå University, Ecology and Environmental Science, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-220.
Full textThe aims of this thesis are to (1) analyze the predictability (indicators) of plant and fungal species diversity in old-growth forests, and (2) assess the history and biodiversity of woodland key habitats (WKHs) and their potential to maintain species diversity in fragmented boreal forest landscapes.
Predictability was explored in Granlandet nature reserve, an unexploited landscape composed of discrete old-growth Picea forest patches of varying size isolated by wetland, reflecting conditions of insular biota at stochastic equilibrium. Data from 46 patches (0.2-12 ha) showed that most species were rare. However, species richness and composition patterns exhibited a high degree of predictability, which strengthen the possibility to apply biodiversity indicators in old-growth forest stands. Area was a key factor. The increase in species richness starts to level out at 2-3 ha. Large patches host more Red-list species in their interiors than do small ones, i.e. stand size is an important qualitative aspect of old-growth habitat. Nestedness emerged in relation to area but also in equal-sized plots. Structural complexity and habitat quality were important for species richness and compositional patterns, and small habitats of high quality could harbor many rare species. Monitoring of wood-fungi on downed logs showed that species diversity on downed logs changed over periods of 5-10 years and that the occurrences of annual species were unpredictable. It is suggested that monitoring of species with durable fruit bodies (mainly polypores) is likely to be a feasible approach to obtain comparable data over time.
Assessments of biodiversity of WKHs were performed in two areas with contrasting histories of forest exploitation, namely in south boreal and north boreal Sweden. Analyses of the history of 15 south boreal WKHs showed that fire-suppression, selective logging until mid-20th century and abandonment by modern forestry has shaped their forest structure. These WKHs are not untouched forests, they lack key structural components and harbor few Red-list species. Artificial interventions to restore natural processes and patterns are needed to further increase their suitability for threatned species. Modeling analyses of species richness in 32 WKHs in north boreal Sweden, some of which have not been isolated by modern forestry until recently, indicated an excess of crustose lichen species, i.e. WKHs may face delayed species extinctions. By contrast, the results indicate that wood-fungi have tracked the environmental changes. Differences in substrate dynamics between epiphytes on living trees and species growing on decaying logs may explain the diffeence between species groups. The results indicate that population densities of Red-list species were low, which may result in further depletion of species diversity.
Continuing species declines and extinctions are likely if not conservation of WKHs are combined with other considerations in th managed forest landscape. Both WKHs and their surroundings must be managed and designed to maintain biodiversity over time. For a successful future conservation of boreal forest biodiversity monitoring of WKHs must be combined with monitoring of refeence areas.
Törnblom, Johan. "A landscape approach towards ecological integrity of catchments and streams /." UUppsala : Dept. of Forest Products, Swedish University of Agricultural Sciences, 2008. http://epsilon.slu.se/200870.pdf.
Full textSánchez, Fernández David. "Uso de los coleópteros acuáticos ibéricos en la conservación de la biodiversidad." Doctoral thesis, Universidad de Murcia, 2008. http://hdl.handle.net/10803/10774.
Full textThis thesis comprises the problem of freshwater biodiversity conservation in the Iberian Peninsula and Balearic Islands using inventories of water beetles as surrogates of biodiversity. The thesis involves different approaches and methods from the double perspective of setting conservation priorities for species and areas. Firstly, the use of water beetles as reliable biodiversity indicators in Maditerranean aquatic ecosystems was assessed. Then, areas for freshwater biodiversity conservation at regional scale were selected using water beetles as biodiversity surrogates. Afterwards, a database of Iberian water beetles was compiled. The survey effort, the degree of geographical coverage and the amount and nature of bias in this database were assessed. Subsequently, a function based on environmental and spatial variables able to predict species richness distribution in the Iberian Peninsula and Balearic Islands were obtained. Lastly, the most threatened endemic water beetles were identified and the effectiveness of existing reserve network (Natura 2000) in protecting them was evaluated.
Sor, Ratha. "Modélisation des changements spatio-temporels des communautés de macroinvertébrés benthiques dans les rivières d'Asie et d'Europe." Thesis, Toulouse 3, 2017. http://www.theses.fr/2017TOU30148/document.
Full textOverall aims: Freshwater tropical and temperate river systems are known to support different biotic communities. In this study, I investigated benthic macroinvertebrate community composition and diversity and its spatial and temporal variation both in tropical Asian and temperate European regions. I also examined the influences of physical-chemical water quality variables on community composition, variations and diversity, and modelled the occurrence of selected species. Locations: Tropical Asia: the Lower Mekong Basin (LMB), covering an area of 609,000 km2; Temperate Europe: Western Europe, Flemish rivers (Belgium), covering an area of 13,787 km2. Materials and Methods: For the LMB, data collected from 2004 to 2008 were used, and median values of this period were analysed. For Flemish rivers, data collected from 1991 to 2010 were used. The data were divided into 4 periods: D1: 1991-1995, D2: 1996-2000, D3: 2001-2005 and D4: 2006-2010. The medians of each period were used for detailed spatial analyses. Multivariate analyses were applied to relate community composition and diversity to physical-chemical variables. Five modelling techniques namely Logistic Regression (LR), Random Forest (RF), Support Vector Machine (SVM), Artificial Neural Network (ANN) and Classification Tree (CT) were used to model the occurrence of selected species. Main results: Community composition variations, diversity and relationship with environmental variables From the LMB, 299 macroinvertebrate taxa belonging to 196 genera and 90 families were identified: 131 insects, 98 molluscs, 38 crustaceans, and 32 annelids
Edlund, Nathalie, and Maria Gaspar. "Jordbruksfåglarnas minskning i Stockholms län : En kvantitativ studie av fåglarna i jordbrukslandskapet." Thesis, Södertörns högskola, Miljövetenskap, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:sh:diva-32676.
Full textHildreth, James. "The selection of biodiversity indicators for business landholdings." Thesis, Aston University, 2012. http://publications.aston.ac.uk/17473/.
Full textCassidy, Sarah Louise. "Microbial activity and biodiversity as indicators of hydrocarbon bioremediation." Thesis, King's College London (University of London), 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.405962.
Full textAcheampong, Isaac. "Urban biodiversity; a global perspective." Thesis, KTH, Mark- och vattenteknik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-171821.
Full textAlizadeh, Shabani Afshin, and afshin alizadeh@rmit edu au. "Identifying bird species as biodiversity indicators for terrestrial ecosystem management." RMIT University. Mathematical and Geospatial Sciences, 2006. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20061116.161912.
Full textNunez-Mino, Jose. "Biodiversity indicators and conservation priorities in Cusuco National Park, Honduras." Thesis, University of Oxford, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.543041.
Full textBaretta, Dilmar. "Fauna do solo e outros atributos edáficos como indicadores da qualidade ambiental em áreas com Araucaria angustifolia no Estado de São Paulo." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/11/11140/tde-22102007-094221/.
Full textThe study of biological soil quality indicators in areas with Araucaria is very important to understand ecological processes in these systems, since groups of the soil fauna are major factors in the decomposition and mineralization of organic matter, as well as modifiers of soil physical, chemical and biological properties and processes. The objective of this study was to evaluate the use of soil fauna and environmental variables as quality indicators in natural and reforested Araucaria areas, impacted or not by fire, by means of multivariate analysis techniques. Four study areas included: native forest with Araucaria (NF); Araucaria reforestation (R); Araucaria reforestation submitted to an accidental fire (RF); and native grass pasture with native Araucaria , submitted to an intense accidental fire (NPF). Soil samples containing the soil fauna community and environmental variables were taken in a 0.3 ha area in each area, close to ten Araucaria trees selected at random, in three contrasting seasons, using different collection methods (soil monolith, Pitfall traps). Canonical discriminant analysis (CDA) and canonical correlation analysis (CCA) were applied to the environmental variables [(carbon of the microbial biomass (CMB), basal respiration (C-CO2) and metabolic quotient (qCO2), litter stocks, soil humidity, pH (CaCl2), organic matter (OM), P, K, Ca, Mg, H+Al] and soil fauna attributes. Five earthworm species (two families), 20 spider families and eight springtail families were found in these areas. Soil fauna diversity, CMB, C-CO2, litter stocks and OM were always higher for the NF area and lower for the NPF. The canonical correlation between environmental variables and soil fauna was highly significant. Soil fauna and environmental variables have a great potential as indicators of soil quality. The groups Collembola, Diplopoda, Chilopoda, Isoptera, Araneae, Oligochaeta, biomass of macrofauna, Shannon's diversity index (H), litter stocks, P, CMB and C-CO2 were mostly responsible for the separation between areas, and are therefore good indicators of the changes that occur in the Araucaria ecosystems. CDA identified that the contribution of each attribute for the separation of the areas varied according to the seasonal variation. Multivariate analyses (such as CDA and CCA) are important auxiliary tools in the study of soil quality indicators.
McElhinny, Chris, and chris mcelhinny@anu edu au. "Quantifying stand structural complexity in woodland and dry Sclerophyll Forest, South-Eastern Australia." The Australian National University. Centre for Resource and Environmental Studies, 2005. http://thesis.anu.edu.au./public/adt-ANU20060322.133914.
Full textCruickshank, Samantha Louise. "Developing biodiversity indicators and economic valuations for created grasslands in the UK." Thesis, Aston University, 2016. http://publications.aston.ac.uk/32262/.
Full textIvits-Wasser, Eva. "Potential of remote sensing and GIS as landscape structure and biodiversity indicators." [S.l. : s.n.], 2004. http://www.bsz-bw.de/cgi-bin/xvms.cgi?SWB11259425.
Full textOLIVEIRA, KAREN PIRES DE. "INTERNATIONAL BIODIVERSITY REGIME: CONFRONTING SUSTAINABILITY AND EFFECTIVENESS INDICATORS FOR THE PROMOTION SUSTAINABLE DEVELOPMENT." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2009. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=13914@1.
Full textEste estudo tem por objetivo analisar a capacidade do Regime Internacional da Biodiversidade (RIB) em resolver o problema de perda da diversidade biológica. Considerando que regimes são efetivos quando servem para solucionar os problemas que motivaram sua criação, este exercício se fundamentou no cruzamento de dois modelos de avaliação: o modelo pressão-estado-resposta, e o modelo de avaliação da efetividade de regimes ambientais. Como resultado, argumenta-se que é possível dar uma visão instrumental ao Regime da Biodiversidade de modo que ele seja visto como um indicador de sustentabilidade ambiental, através de seu grau de efetividade. Neste sentido, utilizando-se do caso exemplar da Reserva de Desenvolvimento Sustentável de Mamirauá, discutiu-se a contribuição dos diferentes atores envolvidos na implementação do RIB e, em que medida os mecanismos de cooperação internacional e financiamento propiciam o fortalecimento institucional necessário para a implementação do Regime. Na conclusão, observou-se que o RIB viabiliza o arcabouço institucional diversificado que contempla a flexibilidade administrativa necessária para gestão e captação de recursos na solução da perda de diversidade biológica. Sua efetividade, entretanto, está diretamente ligada a um processo político onde através do diálogo entre atores estatais e sociedade civil global é possível estabelecer um fluxo continuado de experiências, entre o local/global, que em muito contribui para redução da perda de diversidade biológica, ampliando estoques de recursos naturais e, conseqüentemente, contribuindo para a promoção do desenvolvimento sustentável.
The goal of this study is to analyze the capacity of the International Biodiversity Regime (IBR) to resolve the problem of the biology diversity loss. Considering that regimes are effective when they serve to solve the problems that caused his creation, this exercise was based on the crossroad of two models of evaluation: the model pression-state-answer and the model of evaluation of the effectiveness of the environmental regimes. As the result, it is argued that is possible to give an instrumental vision to the Biodiversity Regime, in way, throught his degree of effectiveness, it is seen as an indicator of environmental sustainability. In this sense, using the exemplary case of the Mamirauá Sustainable Development Reserve, there was discussed the contribution of the different actors wrapped in the implementation of the IBR and in which measure the mechanisms of international cooperation and financing can favor institutional strengthening necessary to the Regime implementation. In the conclusion, it was observed that the IBR make practical the institutional diversified outline that contemplates administrative necessary flexibility for management and resources collectation in the solution of the biology diversity loss. His effectiveness, however, is straightly connected with a political process, where throught the dialog state actors and civil global society is possible to settle a continuated flow of experiences, between the local and the global, which in much contributes to the reduction of the biological diversity loss, enlarging the natural resources stocks and consequently, contributing to the promotion of the sustainable development.
Allen, Laura. "The application of biodiversity indicators to infer ecosystem health in regenerating tropical forest." Thesis, University of Glasgow, 2019. http://theses.gla.ac.uk/40949/.
Full textLebrun, Jérémie. "Biodiversité fonctionnelle fongique : indicateur d'écotoxicité des métaux dans les sols ?" Rouen, 2010. http://www.theses.fr/2010ROUES040.
Full textBeazley, Karen. "A focal-species approach to biodiversity management in Nova Scotia." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0026/NQ36569.pdf.
Full textMörtberg, Ulla. "Landscape Ecological Analysis and Assessment in an Urbanising Environment - forest birds as biodiversity indicators." Doctoral thesis, KTH, Land and Water Resources Engineering, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3768.
Full textTo achieve a sustainable development, impacts onbiodiversity of urbanisation, infrastructure, land use changesand other developments must be considered on a landscape andregional scale. Landscape ecology can provide a conceptualframework for the assessment of consequences of long-termdevelopment processes like urbanisation on biodiversity on alandscape scale, and for evaluating the impacts of alternativeplanning scenarios. The aim of this study was to explore theeffects of habitat quality, quantity and connectivity on forestbird diversity in an urban-rural gradient. The purpose of theanalyses was to develop knowledge and methods for integratingbiodiversity issues in planning and assessments in anurbanising environment, on landscape and regional scales.
The study area was situated in and around Stockholm, thecapital of Sweden, covering the city centre, suburbs andperi-urban areas. Data on breeding forest birds were collectedthrough bird censuses in an urban-suburban gradient. In orderto embrace also the peri-urban areas for a more completeurban-rural gradient, data on two fragmentation-sensitiveforest grouse species were obtained through a questionnaire tohunters in the whole study area. Response variables in theanalyses were forest bird species richness and diversity,relative species richness and occurrence of single sensitivespecies like selected sedentary forest birds, including theforest grouse species, and red list species. Habitat quality,quantity and connectivity were analysed using available data onabiotic conditions, including urban disturbances, andvegetation in geographical information systems. In addition, afield study on vegetation structure and composition wasperformed in a subset of the smaller sample sites.Relationships between the response variables and habitatquality, quantity and connectivity were explored usingstatistical methods like multivariate statistics and regressionmodelling. Further, for some models, spatial dependencies werequantified and accounted for. When habitat models wereretrieved, they were used for spatial predictions of habitatsuitability. They were also applied on future planningscenarios in order to predict and assess the impacts onsensitive species. In the urban-rural gradient, the foreststructure and composition changed, so that in more urban areas,coniferous forest on rich soils, wet forests and wetlandsbecame less abundant and more scattered. Sensitive birdspecies, tied to these habitat types, were shown to besensitive to habitat fragmentation caused by urbanisation.Large, well-connected habitat patches and aggregations ofsuitable habitat in the landscape had a higher probability ofoccupancy when compared to other patches. For the forest grousespecies, effects of car traffic added to the explanation oftheir distribution. By contrast, deciduous forest was stillquite common in predominantly urban areas, due to both latechanges in land use and a history of human preferences. Certainred listed bird species tied to deciduous forest did not seemto be affected by isolation, and also occurred in suitablehabitats in some highly urbanised areas. Furthermore, relativespecies richness in the urban-suburban gradient was related tomulti-layered deciduous forest habitats with a large amount ofdead wood. Such habitats were associated with natural shorelineand with old pastures and parks. From the derived statisticalmodels, describing the relationships between sensitive speciesand environmental variables, predictive habitat maps could becreated for the present situation and for planning scenarios.The predictions of the impacts on habitats of sensitive speciesmade it possible to quantify, integrate and visualise theeffects of urbanisation scenarios on aspects of biodiversity ona landscape scale.
Chey, Vun Khen. "Comparison of biodiversity between plantation and natural forests in Sabah using moths as indicators." Thesis, University of Oxford, 1994. http://ora.ox.ac.uk/objects/uuid:14f1640d-aa6e-4679-ad8c-d74decfa506a.
Full textCharnock, Rebecca Brigid. "Assessment of remote sensing attributes as biodiversity indicators on a European protected raised bog." Thesis, Aberystwyth University, 2016. http://hdl.handle.net/2160/540a622d-ad36-453d-b64d-c45faa77e15a.
Full textSun, Ye. "Studies on Spring Conservation: Biological Indicators, Habitat Classification and its Assessment." Kyoto University, 2020. http://hdl.handle.net/2433/253446.
Full textKyoto University (京都大学)
0048
新制・課程博士
博士(総合学術)
甲第22610号
総総博第10号
新制||総総||2(附属図書館)
京都大学大学院総合生存学館総合生存学専攻
(主査)教授 山敷 庸亮, 准教授 趙 亮, 准教授 竹門 康弘
学位規則第4条第1項該当
Eisenmenger, Nina, Stefan Giljum, Franz Stephan Lutter, Alexandra Marques, Michaela C. Theurl, Henrique M. Pereira, and Arnold Tukker. "Towards a conceptual framework for social-ecological systems integrating biodiversity and ecosystem services with resource efficiency indicators." MDPI AG, 2016. http://dx.doi.org/10.3390/su8030201.
Full textThuillier, Laura. "Prise en compte de la biodiversité par une entreprise industrielle : le cas de Storengy." Electronic Thesis or Diss., Paris, Muséum national d'histoire naturelle, 2020. http://www.theses.fr/2020MNHN0003.
Full textIndustrial companies, due to the nature of their activities and the land ownership of their production sites, negatively impact biodiversity. Some are beginning to integrate biodiversity conservation into their strategy as a response to societal pressures. This thesis aims to answer the following question: how can an industrial company take biodiversity conservation into account in its activities? To answer this question, we have mobilized two disciplines, management sciences and conservation sciences, in three complementary axes. Our study field was the natural gas storage company, Storengy. To understand how biodiversity conservation was addressed in the company, we conducted an ethnographic survey of its biodiversity strategy, which was established in 2010. We showed that it was associated with a hybrid institutional logic combining conservation objectives with the strategic objectives. The biodiversity manager, ecologists, the green space company and employees participated in legitimizing, framing and developing the strategy. Experiences of nature proved to be important factors in employee engagement. Finally, we outline the tensions related to the biodiversity strategy and its limited scope in the company because of the inertia of the system. To help the company in improving biodiversity on its sites, we have proposed biodiversity indicators. They make it possible to assess biodiversity issues at the territory and plot scale and, based on this, to guide the company in the management of its land estate. Finally, to understand how industrial facilities could be mobilized to improve biodiversity on a local scale, we studied several taxonomic groups (flora, butterflies and birds) present on a particular piece of equipment: gas well platforms. We showed that, in relatively intensive agricultural landscapes, gas well platforms landscaping could favor communities that are sensitive to human disturbance. This thesis improves our knowledge of how companies take biodiversity into account and the tools they can use to assess and manage biodiversity on their land and thus contribute to its conservation
Coulston, John Wesley. "Large-scale analysis of sustainable forest management indicators: assessments of air pollution, forest disturbance, and biodiversity." NCSU, 2004. http://www.lib.ncsu.edu/theses/available/etd-03282004-103433/.
Full textBezombes, Lucie. "Développement d'un cadre méthodologique pour l'évaluation de l'équivalence écologique : Application dans le contexte de la séquence "Éviter, Réduire, Compenser" en France." Thesis, Université Grenoble Alpes (ComUE), 2017. http://www.theses.fr/2017GREAS044/document.
Full textIn light of the global erosion of biodiversity caused by human activities, biodiversity offsets and, more broadly the Mitigation Hierarchy, are increasingly used since the 1970s, with the ambition of reconciling economic development and biodiversity conservation. Its objective is to achieve "No Net Loss" (NNL) of biodiversity. One of the key issues to achieve this goal is to demonstrate ecological equivalence between the gains from offsets and the losses caused by impacts. Despite regulatory improvements, the French law does not include a method for assessing equivalence, and no method is unanimously recognized. This leads to heterogeneous practices and difficulties in reaching the NNL objective. In this context, this thesis aims to develop a standardized methodological framework (SMF) for assessing equivalence, which combines operationality, scientific basis and comprehensiveness (taking into account the four dimensions of equivalence: ecological, spatial, temporal and uncertainties). First, 13 methods used abroad are analysed in order to identify structural elements for the development of a SMF adapted to the French context. The construction is decomposed into three steps. The first consists in selecting an organized set of indicators, on which equivalence assessment should be based in order to meet legislative requirements and reflect the complexity of biodiversity. The assessment is to be done at two spatial scales (on-site and within an expanded perimeter) and at three levels reflecting general or specific issues (habitat or species). The second step regards the prediction of the values of the indicators over time, consequently to the impacts and offsets, taking into account the implied uncertainties. The third step leads us to establish rules for calculating losses and gains, as well as for the overall assessment of equivalence. Finally, this SMF is tested on two study sites in order to demonstrate the added value and to identify its limits. Prospects for improving the SMF, and more broadly the evaluation of equivalence, are then suggested. Finally, all these elements make it possible to question the effectiveness of offsets in order to tackle biodiversity erosion
Brin, Antoine. "Le bois mort et les Coléoptères associés dans les plantations de pin maritime (Pinus pinaster, L.) : implications possibles pour la gestion durable des forêts et l’élaboration d’indicateurs de biodiversité." Thesis, Bordeaux 1, 2008. http://www.theses.fr/2008BOR13735/document.
Full textDead wood has been selected as one of the biodiversity indicators for the assessment of sustainable forest management. We investigated the relevance of this indicator in forest plantations with experimental data. Our approach was focus on beetles which represent 20% of saproxylic species. Effects of environmental variables on species richness and composition of assemblages occurred at three spatial scales : the piece of wood (diameter, decomposition stage and type), the stand (volume of dead wood, density of stems, canopy cover) and the landscape (% of maritime pine stands,% of deciduous stands and % of clear-cut areas). Diversity of dead wood above 15 cm in diameter appeared to be a good indicator of the local species richness of saproxylic beetles. A model of dead wood dynamic has been proposed so as to assess impacts of new forestry practices on saproxylic beetles diversity
Ortiz, Lerín Roser. "Diatomees de la conca de l’Ebre: Biodiversitat i estat ecològic de l’aigua." Doctoral thesis, Universitat de Barcelona, 2011. http://hdl.handle.net/10803/83471.
Full text"Diatoms of the Ebro basin: Biodiversity and ecological state of water" TEXT: The aim of this PhD thesis is to contribute to the taxonomic knowledge of the epilithic diatom flora from the rivers of the Ebro basin and to determinate the water quality status in the studied area using benthic diatoms as indicators. The studied area is located inside the Water Quality Surveillance Network of the Ebro Water Agency, CHE (NE Spain). It includes the Ebro and Garona rivers and all the rivers and streams which run into them in the Spanish territory, mostly over a calcareous and sedimentary substrata. A total of 408 epilithic diatoms samples were collected from different environments and ecoregions within the limits of the network of the Ebro Water Agency, CHE (NE Spain) during the summers of 2005 (197 sites) and 2006 (211 sites). Epilithic diatom were sampled, and then treated to prepare permanent diatoms slides following the standard methods (European Committee for Standardization 2003, 2004). The number of taxa identified in the material studied amounted to 499 (492 a specific or infra specific level), belonging to 91 different genera. 361 taxa are presented in 751 light microscope micrographs regrouped in 25 plates. We noticed the presence of species considered rare or exotic for European freshwaters (Coste & Ector, 2000) such as Diadesmis confervacea; Achnanthidium catenatum, Reimeria uniseriata, Navicula kotschyi, Gomphoneis minuta and Didymosphenia geminata. A few diatoms species presented teratological forms have been detected in some localities. However, we could not find a direct relationship of these forms occurrence and any particular cause. In order to evaluate the water quality assessment, three diatoms indices were applied (Specific Pollution Index IPS, Biological Diatom Index BDI and European Index CEC). All of them correlated significantly with water physical and chemical variables, but SPI achieved better correlations, and is therefore to be the best diatom index to be applied in the Ebro basin, although in some cases it did not properly reflected special situations in this basin as calcareous headwaters. According to the cluster and canonical correspondence analyses, nutrient enrichment (from the headwaters to the mouth), environmental variables and impacts were to be the most important variables structuring diatom communities in the Ebro basin.
Angelstam, Per, Jean-Michel Roberge, Robert Axelsson, Marine Elbakidze, Karl-Olof Bergman, Anders Dahlberg, Erik Degerman, et al. "Evidence-Based Knowledge Versus Negotiated Indicators for Assessment of Ecological Sustainability : The Swedish Forest Stewardship Council Standard as a Case Study." Linköpings universitet, Biologi, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-90236.
Full textMeinel, Gotthard, and Ulrich Schumacher. "Flächennutzungsmonitoring III." Rhombos-Verl, 2011. https://slub.qucosa.de/id/qucosa%3A4658.
Full textZetterberg, Andreas. "Network Based Tools and Indicators for Landscape Ecological Assessments, Planning, and Design." Licentiate thesis, Stockholm : Arkitektur och samhällsbyggnad, Kungliga Tekniska högskolan, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-10011.
Full textFlor, Arnau Núria. "Diversitat, ecologia i usos en bioindicació d’algues caràcies i macròfits a la península Ibèrica." Doctoral thesis, Universitat de Barcelona, 2014. http://hdl.handle.net/10803/285506.
Full textLa Península Ibérica es un territorio muy diverso en lo que se refiere a ecosistemas acuáticos. No obstante, son escasas las publicaciones referentes a la flora que los ocupa. En esta tesis se presenta un catálogo florístico de 846 muestras de algas caráceas recolectadas en 456 masas de agua diferentes. Se han identificado 28 especies o variedades pertenecientes a los cinco géneros citados en España, siendo Chara el más frecuente, y se amplía el área de distribución de 18 especies o variedades y la ecología de 8 de ellas, algunas vulnerables o en peligro de extinción. De esta manera se incrementa el conocimiento que se tiene sobre este grupo algal y se apuntan algunas de las causas principales que han ocasionado el descenso de especies a lo largo del tiempo en la cuenca del río Duero, relacionadas principalmente con la agricultura y la ganadería. Por otra parte, las caráceas son organismos con una elevada plasticidad morfológica en relación a las condiciones ambientales y existen complejos de especies que hacen que su identificación no siempre resulte una tarea fácil. La pareja conflictiva Chara aspera-Chara galioides se diferencia básicamente por el diámetro de los anteriodióforos maduros, pero este carácter podría no tener significación sistemática. Con el objetivo de conocer el efecto de la luz, la temperatura y la salinidad sobre la morfometría de diversas estructuras, se han cultivado en una cámara y se proponen nuevos caracteres vegetativos que harían factible su separación como dos especies diferentes, tales como el diámetro del eje principal. Para acabar, los ecosistemas acuáticos lóticos y leníticos de la Península Ibérica están sometidos a multitud de presiones antropogénicas que ponen en serio compromiso su continuidad y la supervivencia de la interesante flora que a menudo los ocupa. Desgraciadamente, España no cuenta actualmente con ningún índice adecuado para conocer el estado de estos ecosistemas. Sin embargo, son muchos los estudios y normativas como la Directiva Marco del Agua que ponen de manifiesto el papel bioindicador de los macrófitos, en general y de las caráceas, en particular. En esta tesis se proponen dos herramientas para evaluar el estado ecológico de lagos y lagunas de la cuenca del río Duero (INEQUAL) y de ríos de ámbito mediterráneo (IMF). Estos dos índices podrían ayudar a tomar medidas de gestión, conservación y restauración de los ecosistemas acuáticos ibéricos.
The Iberian Peninsula is a very diverse country in terms of aquatic ecosystems. However, there are few publications on the flora that occupies these bodies of water. This thesis presents a floristic catalogue of 846 charophyte samples collected from 456 different localities. We have identified 28 species or varieties of the five genera currently present in Spain, being Chara the most frequently sampled, and we have provided new data on the area of distribution of 18 species or varieties and the ecology of 8 of them, some vulnerable or endangered. Thus, the knowledge we have on this algal group increases and we have also proposed some of the main causes that have led to the decline of species over time in the Douro river basin, which are mainly related to agriculture and farming. Moreover, the charophytes are organisms with high morphological plasticity in relation to the environment conditions and there also exist complexes of species that make their identification not always a straightforward matter. The pair of taxa Chara aspera-Chara galioides was traditionally discriminated by the diameter of the mature antheridia, but this character could not have any systematic significance. In order to determine the effect of light, temperature and salinity on the morphometry of different structures, they have been grown in a culture chamber and new vegetative characteristics, such as the diameter of the main axis, are proposed to split them as two different species. Finally, lotic and lentic aquatic ecosystems of the Iberian Peninsula are subjected to many anthropogenic pressures that seriously compromise their continuity and the survival of their interesting flora. Unfortunately, Spain does not currently have any suitable index for the assessment of the ecological status of these ecosystems. However, many studies and the Water Framework Directive highlight the bioindicator role of macrophytes, in general and charophytes, in particular. In this thesis, we propose two indices to assess the ecological status of the lakes and lagoons of the Duero river basin (INEQUAL) and the Mediterranean rivers (IMF). With this information it would be possible to apply management, conservation and, if necessary, restoration measures in these aquatic habitats.
Öster, Mathias. "Biological diversity values in semi-natural grasslands : indicators, landscape context and restoration." Doctoral thesis, Stockholm University, Department of Botany, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-1352.
Full textSemi-natural grasslands, which are a declining and fragmented habitat in Europe, contain a high biodiversity, and are therefore of interest to conservation. This thesis examines how plant diversity is influenced by the landscape context, and how plant and fungal diversity can be targeted by practical conservation using indicator species and congruence between species groups. Reproduction and recruitment of the dioecious herb Antennaria dioica was also investigated, providing a case study on how fragmentation and habitat degradation may affect grassland plants.
Grassland size and heterogeneity were of greater importance for plant diversity in semi-natural grassland, than present or historical connectivity to other grasslands, or landscape characteristics. Larger grasslands were more heterogeneous than smaller grasslands, being the likely reason for the species-area relationship.
A detailed study on A. dioica discovered that sexual reproduction and recruitment may be hampered due to skewed sex-ratios. Sex-ratios were more skewed in small populations, suggesting that dioecious plants are likely to be particularly sensitive to reduced grassland size and fragmentation.
A study on indicators of plant species richness, used in a recent survey of remaining semi-natural grasslands in Sweden, revealed several problems. A high percentage of all indicator species were missed by the survey, removing an otherwise significant correlation between indicator species and plant species richness. Also, a null model showed that the chosen indicator species did not perform significantly better than species chosen at random from the available species pool, questioning the selection of the indicators in the survey. Diversity patterns of the threatened fungal genus Hygrocybe were not congruent with plant species richness or composition. Plants are thus a poor surrogate group for Hygrocybe fungi, and probably also for other grassland fungi. Implications from this thesis are that conservation of semi-natural grasslands should target several species groups, and that an appropriate scale for plant conservation may be local rather than regional.
ASANTE, MELDOMI ASABEA. "EFFECT OF URBAN RIPARIAN DEVELOPMENT ON BIODIVERSITY; USING BIRDS AND VEGETATION AS ECOLOGICAL INDICATORS IN COOPER CREEK LOCATED IN SOUTHWEST OHIO." Miami University / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=miami1146157392.
Full textAguillaume, Rodríguez-O’connor Laura. "Nitrogen deposition at Mediterranean holm-oak forests: loads and indicators." Doctoral thesis, Universitat Autònoma de Barcelona, 2015. http://hdl.handle.net/10803/321108.
Full textWith the present PhD we provide new information on N deposition to holm oak (Quercus ilex) forests in Spain, in order to contribute to fill the gap about N deposition in the Mediterranean Basin. Three forest sites were selected for their proximity to traffic/urban pollution sources and a fourth site was chosen as representative of less polluted environments. Results showed that the site farthest from pollution had similar anthropogenic pollutant (N and S) deposition loads than two of the more exposed sites. A widespread transport of pollutants from metropolitan areas, maritime traffic and long-range transport affected the sampling areas. In throughfall samples, K+ was explained by leaching from the canopies, SO42--S and NO3--N were generally derived from dry deposition while NH4+-N was absorbed in the tree canopies. The estimated dry deposition provided a 74 and 84 % to the total deposition of 17 and 20 kg N ha-1 yr-1 at LC and CB, respectively. The results of this PhD indicate that total N deposition at various sites in Spain exceeds (about 30%) the proposed critical load for sclerophyllous forests. The chemistry of bulk deposition at the Montseny mountains during the past 3 decades was analysed in order to understand how the abatement programs implemented by the Convention on Long Range Transboundary Atmospheric Pollution (CLRTAP) from UN/ECE to reduce SO2, NO2 and NH3 emissions have affected atmospheric deposition at this site. Strong reductions of SO2 emissions in Spain and neighbouring countries (75-85%) were reflected in reductions of non-sea salt-SO42- in precipitation (65% for concentrations and 62% for SO42-S deposition) and dry deposition (29%) at Montseny comparing measurements in 1995-96 and 2011-13. The NO2 emissions in Spain increased from 1980 to 1991, remained constant until 2005, and decreased thereafter, similar as NO3- in bulk precipitation at Montseny. This contrasted with an increase of NO3- -N dry deposition from 1995-96 compared to 2011-2012 (from 1.3 to 6.7 kg ha-1y-1), attributed to the particular climatic conditions of each period. The increase of NH3 emissions in Spain during the last 30 years (13%) was not reflected in the NH4+ bulk deposition trends at Montseny, probably related to a decrease of the formation of ammonium sulphate and nitrate aerosols due to declining SO2 and NOx emissions. In Spain, NH3 emissions have not been reduced. Therefore, studies are needed for early warning of its effects on ecosystems. Here, we propose a critical level value of < 2.5 µg m-3 NH3 air concentrations to protect lichen communities at semi-natural holm oak forest. This value was calculated by studying the relationships between air NH3 concentrations and lichen diversity values separated by functional groups (oligotrophic and nitrophytic) in a distance gradient from an emission point source (cattle farm). Besides, other parameters (%N, δ15N, C:N, δ13C) measured in different compartments (tree leaves, moss tissue and soil) of the ecosystem also respond to NH3 pollution and serve as indicators of pollution. The leaves and moss δ15N signal variation along the gradient reflected the N isotopic signal of the NH3 source. The %N and δ15N signal values in moss and leaves were significantly correlated with the relative nitrophytic functional group diversity and air NH3 concentrations, which highlights the specific response of nitrophytic species to NH3 pollution. In soils, the δ15N signal and C:N ratios were significantly related to NH3 pollution, with soil C:N values (C:N<25) indicative of the onset of N leaching and alerting about the potential N saturation and the risk of groundwater eutrophication at this forest. Finally, the variation in δ13C content in foliar and moss samples reflected the physiological response of vegetation to enhanced N deposition.
Rabaud, Suzanne. "Les indicateurs de biodiversité entre connaissances et actions : impasses, détours ou raccourcis pour les stratégies environnementales ?" Thesis, Paris, AgroParisTech, 2016. http://www.theses.fr/2016AGPT0005.
Full textFor twenty years biodiversity indicators have been elaborated at all scales of public policies. Our thesis proposes a strategic analysis of the design and use of indicators based on four case studies. Our goals are first to understand the strategic role of indicators at the interface between knowledge and action, and second to propose useful insights to researchers and practitioners who design and use biodiversity indicators in the field.The biodiversity indicators that we have studied contribute to at least two types of conservation practitioners’ strategies : strategies of intervention, which main focus is to help some actors to better integrate biodiversity in various collective action systems ; and strategies of positioning, which main objective is to modify power relationships in a way that benefits to those actors. In the current context in which scientific expertise prevails more than militant actions, biodiversity indicators are mostly used in strategies to reinforce a temporary disconnection between knowledge and action and to improve environmental actors positioning. The interest in using indicators lies partly on their ability to simultaneously connect and disconnect knowledge and action depending on the strategic needs of actors. Furthermore, conservation actors are confronted to a double objective : (1) to propose indicators that can be part of the existing action system and (2) that can modify this action system, by bringing new conceptions of biodiversity, new rules, new power relationships, etc. In this perspective, actors try to anticipate future evolutions of the action system. In our work, the mobilization of negotiation studies allows us to clarify actors' perspectives and to better understand how various action systems work. More generally, the strategic analysis of indicators that we developed in this thesis, inspired by management sciences, is complementary to sociology and policy sciences approaches on instruments, and more precisely on indicators. It underlines new aspects of the contribution that indicators can bring to biodiversity conservation
Greyling, Telané. "Factors affecting possible management strategies for the Namib feral horses / Telané Greyling." Thesis, North-West University, 2005. http://hdl.handle.net/10394/1244.
Full textThesis (Ph.D. (Zoology))--North-West University, Potchefstroom Campus, 2006.
Gouix, Nicolas. "Gestion forestière et biodiversité, les enjeux de conservation d'une espèce parapluie : Limoniscus violaceus (Coleoptera)." Phd thesis, Université Pierre et Marie Curie - Paris VI, 2011. http://tel.archives-ouvertes.fr/tel-00824627.
Full textRambo, Henrike [Verfasser], and Christian [Akademischer Betreuer] Möllmann. "From fish biodiversity indicators to spatial risk assessments : Towards the integration of Blue Growth and conservation objectives in the German Bight / Henrike Rambo ; Betreuer: Christian Möllmann." Hamburg : Staats- und Universitätsbibliothek Hamburg, 2017. http://d-nb.info/1148650520/34.
Full textLeong, Elaine. "Water Situation In China - Crisis Or Business As Usual?" Thesis, Linköpings universitet, Industriell miljöteknik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-94186.
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