Academic literature on the topic 'RIVERINE LANDSCAPE ECOLOGY'
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Journal articles on the topic "RIVERINE LANDSCAPE ECOLOGY"
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WIENS, JOHN A. "Riverine landscapes: taking landscape ecology into the water." Freshwater Biology 47, no. 4 (April 2002): 501–15. http://dx.doi.org/10.1046/j.1365-2427.2002.00887.x.
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Schröder, B. "Pattern, process, and function in landscape ecology and catchment hydrology – how can quantitative landscape ecology support predictions in ungauged basins (PUB)?" Hydrology and Earth System Sciences Discussions 3, no. 3 (June 29, 2006): 1185–214. http://dx.doi.org/10.5194/hessd-3-1185-2006.
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Abstract. The understanding of landscape controls on the natural variability of hydrologic processes is an important research question of the PUB (Predictions in Ungauged Basins) initiative. Quantitative landscape ecology, which aims at understanding the relationships of patterns and processes in dynamic heterogeneous landscapes, may greatly contribute to this research effort by assisting the coupling of ecological and hydrological models. The present paper reviews the currently emerging rapprochement between ecological and hydrological research. It points out some common concepts and future research needs in both areas in terms of pattern, process and function analysis and modelling. Focusing on riverine landscapes, the interrelation between ecological and hydrological processes are illustrated. Two further complementary examples show how both disciplines can provide valuable information for each other. I close with some visions about promising (landscape) ecological concepts that may help advancing one of the most challenging tasks in catchment hydrology: Predictions in ungauged basins.
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Schröder, B. "Pattern, process, and function in landscape ecology and catchment hydrology – how can quantitative landscape ecology support predictions in ungauged basins?" Hydrology and Earth System Sciences 10, no. 6 (December 19, 2006): 967–79. http://dx.doi.org/10.5194/hess-10-967-2006.
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Abstract. The understanding of landscape controls on the natural variability of hydrologic processes is an important research question of the PUB (Predictions in Ungauged Basins) initiative. Quantitative landscape ecology, which aims at understanding the relationships of patterns and processes in dynamic heterogeneous landscapes, may greatly contribute to this research effort by assisting the coupling of ecological and hydrological models. The present paper reviews the currently emerging rapprochement between ecological and hydrological research. It points out some common concepts and future research needs in both areas in terms of pattern, process and function analysis and modelling. Focusing on riverine as well as semi-arid landscapes, the interrelations between ecological and hydrological processes are illustrated. Three complementary examples show how both disciplines can provide valuable information for each other. I close with some visions about promising (landscape) ecological concepts that may help advancing one of the most challenging tasks in catchment hydrology: Predictions in ungauged basins.
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Woodgate, Z., G. Distiller, and MJ O’Riain. "Hare today, gone tomorrow: the role of interspecific competition in shaping riverine rabbit occurrence." Endangered Species Research 44 (March 25, 2021): 351–61. http://dx.doi.org/10.3354/esr01106.
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Effective conservation, particularly of threatened species, requires an understanding of both abiotic and biotic drivers of distribution. In the case of one of Africa’s most endangered mammals, the riverine rabbit Bunolagus monticularis, only environmental covariates of presence have been used to provide coarse predictions of their distribution. Two potential competitors, namely scrub hare Lepus saxatilis and cape hare L. capensis, have significant (>90%) range overlap with the riverine rabbit, yet little is known about how these species interact. We used multi-species occupancy models, which model co-occurrence as a function of environmental variables, to assess the spatial response of riverine rabbits to both species of hare in Sanbona Wildlife Reserve, South Africa. We also examined temporal overlap between riverine rabbits and hares. Camera trapping data were collected from 150 camera traps distributed in clusters of 5 cameras at 30 independent sites, covering 223.24 km2. Contrary to prior studies, we found that riverine rabbits were not restricted to riparian habitat, and that their occurrence was conditional on hare absence and was negatively affected by terrain ruggedness. Whilst hare occurrence was independent of terrain ruggedness, it was negatively affected by rabbit presence. Activity patterns revealed high temporal overlap between hares and rabbits (Δ = 0.828, CI = 0.745-0.940); however, neither species co-occurred at any given site. Our results suggest that conservation management has greatly underestimated the importance of competition with other lagomorphs in understanding riverine rabbit occurrence.
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Erős, Tibor, and Winsor H. Lowe. "The Landscape Ecology of Rivers: from Patch-Based to Spatial Network Analyses." Current Landscape Ecology Reports 4, no. 4 (November 16, 2019): 103–12. http://dx.doi.org/10.1007/s40823-019-00044-6.
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Abstract Purpose of Review We synthesize recent methodological and conceptual advances in the field of riverscape ecology, emphasizing areas of synergy with current research in landscape ecology. Recent Findings Recent advances in riverscape ecology highlight the need for spatially explicit examinations of how network structure influences ecological pattern and process, instead of the simple linear (upstream-downstream) view. Developments in GIS, remote sensing, and computer technologies already offer powerful tools for the application of patch- and gradient-based models for characterizing abiotic and biotic heterogeneity across a range of spatial and temporal scales. Along with graph-based analyses and spatial statistical stream network models (i.e., geostatistical modelling), these approaches offer improved capabilities for quantifying spatial and temporal heterogeneity and connectivity relationships, thereby allowing for rigorous and high-resolution analyses of pattern, process, and scale relationships. Summary Spatially explicit network approaches are able to quantify and predict biogeochemical, hydromorphological, and ecological patterns and processes more precisely than models based on longitudinal or lateral riverine gradients alone. Currently, local habitat characteristics appear to be more important than spatial effects in determining population and community dynamics, but this conclusion may change with direct quantification of the movement of materials, energy, and organisms along channels and across ecosystem boundaries—a key to improving riverscape ecology. Coupling spatially explicit riverscape models with optimization approaches will improve land protection and water management efforts, and help to resolve the land sharing vs. land sparing debate.
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Earnest, Kate, Jason Scott, Jake Schaefer, and David Duvernell. "The landscape genetics of syntopic topminnows (Fundulus notatusandF. olivaceus) in a riverine contact zone." Ecology of Freshwater Fish 23, no. 4 (November 10, 2013): 572–80. http://dx.doi.org/10.1111/eff.12109.
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Espinoza, T., CL Burke, L. Carpenter-Bundhoo, S. Marshall, D. Roberts, and MJ Kennard. "Fine-scale acoustic telemetry in a riverine environment: movement and habitat use of the endangered Mary River cod Maccullochella mariensis." Endangered Species Research 42 (July 23, 2020): 125–31. http://dx.doi.org/10.3354/esr01046.
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Understanding movement and habitat requirements of endangered species is critical to conservation management. We evaluate fine-scale acoustic telemetry to study breeding-related movement and habitat use of the endangered Mary River cod Maccullochella mariensis in a riverine environment and, in relation to key environmental variables, to inform management. Movement activity varied significantly in relation to water temperature and diel period, and spatial occupancy and habitat selection varied substantially in relation to the nesting behaviour of Mary River cod. Important nesting habitat included a large hollow log mid-channel and well-shaded logs and log jams adjacent to the river bank. Extrapolating this information to the general population was inhibited by relatively small sample sizes, due in part to the restricted spatial scale of the hydrophone arrays and longitudinal movements of tagged fish beyond the acoustic range of our array. Notwithstanding this, our results demonstrate that (1) fine-scale acoustic telemetry can quantify complex biological behaviours in riverine environments; (2) Mary River cod require specific environmental stimuli and habitat to support the reproductive cycle; and (3) changing environmental conditions may influence Mary River cod behaviour, and understanding this response is necessary for sustainable management. Findings from this study can inform future applications of this methodology in riverine environments and contribute to the development of management strategies and habitat restoration activities supporting the recovery of Mary River cod populations.
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Huang, Jr-Chuan, Tsung-Yu Lee, Teng-Chiu Lin, Thomas Hein, Li-Chin Lee, Yu-Ting Shih, Shuh-Ji Kao, Fuh-Kwo Shiah, and Neng-Huei Lin. "Effects of different N sources on riverine DIN export and retention in a subtropical high-standing island, Taiwan." Biogeosciences 13, no. 6 (March 23, 2016): 1787–800. http://dx.doi.org/10.5194/bg-13-1787-2016.
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Abstract. Increases in nitrogen (N) availability and mobility resulting from anthropogenic activities have substantially altered the N cycle, both locally and globally. Taiwan characterized by the subtropical montane landscape with abundant rainfall, downwind of the most rapidly industrializing eastern coast of China, can be a demonstration site for extremely high N input and riverine DIN (dissolved inorganic N) export. We used 49 watersheds with similar climatic and landscape settings but classified into low, moderate, and highly disturbed categories based on population density to illustrate their differences in nitrogen inputs (through atmospheric N deposition, synthetic fertilizers, and human emission) and DIN export ratios. Our results showed that the island-wide average riverine DIN export is ∼ 3800 kg N km−2 yr−1, approximately 18 times the global average. The average riverine DIN export ratios are 0.30–0.51, which are much higher than the averages of 0.20–0.25 of large rivers around the world, indicating excessive N input relative to ecosystem demand or retention capacity. The low disturbed watersheds have a high N retention capacity and DIN export ratios of 0.06–0.18 in spite of the high N input (∼ 4900 kg N km−2 yr−1). The high retention capacity is likely due to effective uptake by secondary forests in the watersheds. The moderately disturbed watersheds show a linear increase in DIN export with increases in total N inputs and mean DIN export ratios of 0.20 to 0.31. The main difference in land use between low and moderately disturbed watersheds is the greater proportion of agricultural land cover in the moderately disturbed watersheds. Thus, their greater DIN export could be attributed to N fertilizers used in the agricultural lands. The greater export ratios also imply that agricultural lands have a lower proportional N retention capacity and that reforestation could be an effective land management practice to reduce riverine DIN export. The export ratios of the highly disturbed watersheds are very high, 0.42–0.53, suggesting that much of the N input is transported downstream directly, and urges the need to increase the proportion of households connected to a sewage system and improve the effectiveness of wastewater treatment systems. The increases in the riverine DIN export ratio along the gradient of human disturbance also suggest a gradient in N saturation in subtropical Taiwan. Our results help to improve our understanding of factors controlling riverine DIN export and provide empirical evidence that calls for sound N emission/pollution control measures.
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Lee, Soo-Dong, Seung-Jun Back, and Hyun-Kyung Kang. "Analysis of the Correlation Between Ecological Status and Location Environment by Cultivated Land Restoration Type of Geumgang Riverine Ecobelt." Journal of People, Plants, and Environment 24, no. 4 (August 31, 2021): 389–401. http://dx.doi.org/10.11628/ksppe.2021.24.4.389.
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Background and objective The purpose of this study is to investigate the ecological status of six areas around Geumgang River that used to be farmlands before they were restored as a riverine ecobelt. This study aims to analyze the correlation between the location environment and ecological status of the sites to identify the environmental factors affecting them. Methods The sites are classified into four types according to restoration: terraced paddy fields, flat paddy fields, artificial wetland, and landscape forest. The survey items were divided into land use status, plant ecology, and animal ecology. Results In terms of plant ecology, terraced paddy fields showed favorable naturality with the rate of native species above 90% and the naturalization index below 10%. In terms of animal ecology, the total number of species found in these areas was biggest in terraced paddy fields, followed by flat paddy fields, artificial wetland, and landscape forest. Regarding species diversity, terraced paddy fields also showed abundant species with an average of 1.05 to 1.09. The results of the correlation analysis showed that the forest area around the sites had the most significant effect on species diversity. The grassland and open water area showed a positive correlation with the total number of animal species and the number of dragonflies, confirming that the marshy grassland had a positive effect. As the cultivated land and urbanized area around the sites increased, it had a negative effect on the distribution of native species and the number of animal species that appeared, and a positive effect on the naturalization index. Conclusion It is necessary to establish preemption and restoration plans for sites such as grasslands adjacent to the forest and terraced paddy fields in order to promote resilience of the diverse species returning to the purchased lands.
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Kroetsch, Shawn A., Karen A. Kidd, Wendy A. Monk, Joseph M. Culp, Zacchaeus G. Compson, and Scott A. Pavey. "The effects of taxonomy, diet, and ecology on the microbiota of riverine macroinvertebrates." Ecology and Evolution 10, no. 24 (November 18, 2020): 14000–14019. http://dx.doi.org/10.1002/ece3.6993.
Full textDissertations / Theses on the topic "RIVERINE LANDSCAPE ECOLOGY"
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Kautza, Adam Robert. "Consequences of landscape change on riverine food webs and aquatic-terrestrial linkages." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1408719548.
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McGinness, Heather M., and n/a. "SPATIAL HETEROGENEITY AND HYDROLOGICAL CONNECTIVITY IN A DRYLAND, ANABRANCHING FLOODPLAIN RIVER SYSTEM." University of Canberra. Resource, Environmental & Heritage Sciences, 2007. http://erl.canberra.edu.au./public/adt-AUC20070731.094606.
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Riverine landscapes are complex. More than just a single channel, they comprise a
shifting mosaic of hydrogeomorphic patches with varying physical and biological
characteristics. These patches are connected by water during flows of varying magnitude
and frequency, at a range of spatial and temporal scales. Combined, landscape
complexity and hydrological connectivity create biological diversity that in turn
maintains the productivity, ecological function, and resilience of these systems. This
thesis investigates the ecological importance of spatial heterogeneity and temporal
hydrological connectivity in a dryland floodplain river landscape. It focuses on
anabranch channels, and uses major carbon sources in these and adjacent landscape
patches as indicators of ecological pattern and process.
A conceptual model was proposed, describing the potential effects upon the distribution
and availability of major carbon sources of: a) a spatial mosaic of hydrogeomorphic
patches in the landscape (e.g. anabranches, river channel, and wider floodplain); and b)
four primary temporal phases of hydrological connection during flow pulses
(disconnection, partial connection, complete connection, and draining). This was then
tested by data collected over a three year period from a 16 km reach of the lower
Macintyre River (NSW/QLD Australia). Results were examined at multiple spatial
scales (patch scale � river channel vs. anabranches vs. floodplain; between individual
anabranches; and within anabranches � entry, middle and exit sites).
The data indicate that spatial heterogeneity in the lower Macintyre River landscape
significantly influences ecological pattern. Carbon quantity was greater in anabranch
channels compared to adjacent river channel patches, but not compared to the floodplain;
while carbon quality was greater in anabranch channels compared to both adjacent river
channel and floodplain patches. Stable isotope analysis indicated that carbon sources that
were predominantly found in anabranch channels supported both anabranch and river
organisms during a winter disconnection phase. Other carbon sources found in the main
river channel and the wider floodplain appeared to play a comparatively minimal role in
the food web.
Different phases of hydrological connection between anabranch channels and the main
river channel were associated with differences in the availability of carbon sources. In the
river channel, draining of water from anabranches (the draining phase) was associated
with relatively high concentrations of dissolved organic carbon (DOC) and low
concentrations of phytoplankton. Conversely, the disconnection phase was associated
with relatively low concentrations of DOC and high concentrations of phytoplankton in
the river channel. In anabranch channels and their waterbodies, the disconnection and
draining phases were associated with high concentrations of both DOC and
phytoplankton. Concentrations of these carbon sources were lowest in anabranches
during the partial and complete connection phases.
Different hydrological connection phases were also associated with changes in trophic
status in the aquatic components of the landscape. On the riverbanks, relatively low rates
of benthic production and respiration during the complete connection phase were
associated with heterotrophy. The remaining phases appeared to be autotrophic. Benthic
production on riverbanks was greatest during the disconnection phase, and respiration
was greatest during the partial connection phase. In the anabranch channels, rates of
production and respiration were similar during the disconnection phase, and were
associated with heterotrophy in the anabranch waterbodies. The remaining phases
appeared to be autotrophic. Respiration was greatest in anabranches during the
disconnection phase, and production was greatest during the draining phase. Both
production and respiration were lowest during complete connection. These differences
and changes varied according to the landscape patch examined.
At a landscape scale, anabranch channels act as both sinks and suppliers of carbon. High
rates of sediment deposition facilitate their role as sinks for sediment-associated carbon
and other particulate, refractory carbon sources. Simultaneously, anabranch channels
supply aquatic carbon sources from their waterbodies, as well as via processes such as
inundation-stimulated release of DOC from surface sediments. Modelled data indicated
that water resource development reduces the frequency and duration of connection
between anabranch channels and the main river channel. This loss of landscape
complexity via loss of connectivity with anabranches has the potential to reduce the total
availability of carbon sources to the ecosystem, as demonstrated by a modelled 13%
reduction in potential dissolved organic carbon release from anabranch sediments.
This thesis has demonstrated the importance of spatial heterogeneity in riverine
landscapes, by documenting its association with variability in the distribution and quality
of primary energy sources for the ecosystem. It has shown that this variability is
augmented by different phases of hydrological connectivity over time. Spatial
heterogeneity and hydrological connectivity interact to increase the diversity and
availability of ecological energy sources across the riverine landscape, at multiple spatial
and temporal scales. This has positive implications for the resilience and sustainability of
the system. Anabranch channels are particularly important facilitators of these effects in
this dryland floodplain river system. Anabranch channels are �intermediate� in terms of
spatial placement, temporal hydrological connection, and availability of carbon sources;
of high value in terms of high-quality carbon sources; and relatively easy to target for
management because of their defined commence-to-flow levels. Further research should
be directed toward evaluating other ecological roles of anabranch channels in dryland
rivers, thereby providing a more complete understanding of the importance of
connectivity between these features and other patches. This knowledge would assist
management of floodplain river landscapes at larger regional scales, including
amelioration of the effects of water resource development.
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Tagwireyi, Paradzayi. "Ant and spider dynamics in complex riverine landscapes of the Scioto River basin, Ohio: implications for riparian ecosystem structure and function." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1398983906.
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Lin, Hung-rung, and 林宏榮. "A Landscape Ecology Study on Country Riverside Planning--A Case Study of Yiren-Village Riverside Park." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/08338118860004498507.
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碩士南華大學
建築與景觀學系環境藝術碩士班
96
In Taiwan, the river terrain is steep and the river course is sloppy, adding to the soil is unstable and the raining season is concentrating, There fore the first step of the river renovation is to construct the flood protection facility. Recently, because of the international trends, the economic development, the increasing of general income, Taiwanese put much athenaeum to pursuit the better quantity and much quantity of living space. To fulfill this expectation, the accessibility to and recreation function of water appear on the riverbank’s. Furthermore, in recent year, the transformation of economic structure and the impact of joining WTO result in new challenge for agricultural production and marketing, Thus the government elaborates on the reconstructs if countryside with expecting to redefine Taiwan’s countryside the strategy of recreational agriculture. Moreover, various units of community development, Vigorly participate the program, incorporating local characters and finding related financial supports, Thus the improvement of countryside’s riverbank become essential for community development. This research takes the sustainability of Ecology as the main elaboration foundation, assign Jiayi County Chu-chi township Yi-ren bridge section river bank as research object. By means of data collections, the long-term ecological monitor, observation and interview, the research is separated from the metropolitan waterfront thinking’s and set up sustainable development strategies and future planning standards for the countryside’s riverbanks in Taiwan. Under the concept of landscape ecology’s structure, function and variation, the research inspects the implementation process of the landscape plan, the research is covers the plants of 69 branches and 202 kinds, most of which are “Gramineae” and the “Asteraceae”. Further discussing of the old tree retention, the sluing discovers that the construction has created the landscape fragmented. By means of analyzing the green construction, obviously the eco-technology method is comparatively more efficient in preserving greenery biodiversity and water, thus deserving much encouragement. The research finds 15 branches and 19 kinds of different species in bird monitor. Most of them are resident birds, which include summer specie. “domestic swallow” and winter species “Motaglla cinerea”and “Domestic sparrow”. The intensity of richness shows passivity along with the stability of matrix. Under the planning stressed on green preservation and ecological-pond creation, the designated site still maintains the richness of bird species. Moreover , under the micro-viewpoint of bird monitor, the designated site testify the fragmented shape theory. The research finds 6 branches and 10 kinds of attests fish species. The appearance of “Acrossocheilus paradoxus” the light pollution level of local water quality. On the other hand, the fix work of river-bed and embankment restoration night result in the obvious reduction of various species. The landscape planning is intended for the eco-technology method, and tries to link local culture sector with natural ecology. However, a lack of discussion from the local people. result in recognition differences in following maintain and issues. In terms of site facilities, the project still pays much attention to recreation faction. Which needs much communication with sustainable management. By function improvements of eco-technology. Method deserves much praise.
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Wu, Yu-Ting, and 吳玉婷. "A landscape ecology study on urban riverside planning-A case study of Water Park in Bajhang River." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/44783466106649817752.
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碩士國立嘉義大學
園藝學系研究所
94
Landscape ecology is to analyze the landscape from the viewpoint of ecology. It mainly includes three features: structure, functionality and change. Geographically, the urban areas in Taiwan are closely related to rivers, which carry a large amount of sediment during the rainy seasons. Urbanization brings dirt and silt to the river, and causes flooding. So, our goal of maintenance is to improve the rivers. With the raising income, people expect a quiet and comfortable living environment that connects with the international trend of sustainable development. The completeness of river green-way system and the connection to other ecosystem corridors are influenced by unsuitable river maintenance and flood control constructions. This research studied the whole urban waterfront planning, including river characteristics, case study of domestic and international waterfront revitalizations, environmental impact indices, and resident participation. The evaluation was divided into three main parts: 1. river corridors evaluation; 2. river environmental evaluation with preferred landscape corridor features and designs of the different river segments; and 3. environmental impact indices evaluation. The Water Park in Bajhang River was investigated and analyzed. Planning recommendations were made according to the results. Urban river flood prevention, water use, ecosystem, and recreation were combined with the idea of eco-friendly river maintenance and water accessibility to construct a harmonic, comfortable, and beautiful urban waterfront environment; in order to arouse the residents’ community sense and environmental awareness; and to attain the goal of sustainable management.
Books on the topic "RIVERINE LANDSCAPE ECOLOGY"
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Capon, Samantha, Cassandra James, and Michael Reid, eds. Vegetation of Australian Riverine Landscapes. CSIRO Publishing, 2016. http://dx.doi.org/10.1071/9780643104525.
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Vegetation communities in Australia's riverine landscapes are ecologically, economically and culturally significant. They are also among the most threatened ecosystems on the continent and have been dramatically altered as a result of human activities and climate change. Vegetation of Australian Riverine Landscapes brings together, for the first time, the results of the substantial amount of research that has been conducted over the last few decades into the biology, ecology and management of these important plant communities in Australia.
The book is divided into four sections. The first section provides context with respect to the spatial and temporal dimensions of riverine landscapes in Australia. The second section examines key groups of riverine plants, while the third section provides an overview of riverine vegetation in five major regions of Australia, including patterns, significant threats and management. The final section explores critical issues associated with the conservation and management of riverine plants and vegetation, including water management, salinity, fire and restoration.
Vegetation of Australian Riverine Landscapes highlights the incredible diversity and dynamic nature of riverine vegetation across Australia, and will be an excellent reference for researchers, academics and environmental consultants.
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Reid, Michael, Samantha Capon, and Cassandra James. Vegetation of Australian Riverine Landscapes: Biology, Ecology and Management. CSIRO Publishing, 2016.
Find full textBook chapters on the topic "RIVERINE LANDSCAPE ECOLOGY"
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Décamps, Henri. "The “why?” and the “so what?” of riverine landscapes." In Issues and Perspectives in Landscape Ecology, 248–56. Cambridge University Press, 2005. http://dx.doi.org/10.1017/cbo9780511614415.026.
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"Community Ecology of Stream Fishes: Concepts, Approaches, and Techniques." In Community Ecology of Stream Fishes: Concepts, Approaches, and Techniques, edited by Christopher M. Taylor. American Fisheries Society, 2010. http://dx.doi.org/10.47886/9781934874141.ch22.
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<em>Abstract</em>.—Riverine fish assemblages on the North American plains continue to change as native species’ distributions shrink and become increasingly fragmented due to impoundment, changes in the quantity and quality of water, and negative interactions of introduced species. To identify important changes to fish assemblages and their environment, long-term data are needed. I used fish assemblage and discharge data from 22 plains river localities across nearly 20 years to identify potential covariation between fish assemblages and the flow regime. I also obtained data on water use at the watershed scale to determine its potential effects on flow regimes and fish assemblages. A modified time series analysis indicated that directional change was occurring for many of the fish assemblages, though the strength of this change was highly variable among localities. Directional change was strongly and positively associated with change in flow regime, and change in flow regime was positively associated with human modification of the landscape, including number of wastewater facilities and returns. These results illustrate how demands on our water resources can ultimately influence riverine fish assemblages, largely by disrupting natural flow regimes. As population growth continues, the integrity of plains fish assemblages and their riverine environment will likely continue to decline, further exacerbating the fragmentation and reduction of species’ geographic ranges.
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"Landscape Influences on Stream Habitats and Biological Assemblages." In Landscape Influences on Stream Habitats and Biological Assemblages, edited by Nathaniel P. Hitt and Paul L. Angermeier. American Fisheries Society, 2006. http://dx.doi.org/10.47886/9781888569766.ch4.
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<em>Abstract.</em>—A key challenge in stream fish ecology and biomonitoring is to partition local and regional influences on assemblage structure. Numerous studies have identified local determinants of species composition (i.e., competition, predation, habitat availability), but regional influences remain poorly understood. Here, we test the hypotheses that (1) fish dispersal from adjacent streams influences local fish assemblage structure, and (2) the effects of interstream dispersal are mediated by local environmental conditions. We evaluated fish and physical habitat data from the U.S. Environmental Protection Agency’s Environmental Monitoring and Assessment Program in western Virginia streams (<em>n </em>= 55). We found significant effects of adjacent stream size on local species richness, mean reproductive age, and riverine species richness. Large adjacent streams (greater than third-order) were associated with increased species richness in second-order sites. Fourth-order sites showed increased riverine species richness and decreased mean reproductive age in the presence of large adjacent streams. The nonrandom effects of adjacent stream size among sites of various stream orders suggests that local environmental conditions mediate the effects of dispersal from adjacent streams. Measures of channel shape (i.e., depth, width, and sinuosity) and microhabitat complexity (i.e., mean substrate size and woody debris) were associated with local assemblage structure in some cases, but did not account for significant variation in fish metrics explained by adjacent stream size. These results indicate that the ability of fish biomonitoring metrics to detect anthropogenic impacts may be improved by calibrating scoring criteria based on the size of adjacent streams.
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Unmack, Peter, William Fagan, Evan Campbell Grant, and Heather Lynch. "Riverine landscapes." In Spatial Ecology, 85–100. Chapman and Hall/CRC, 2009. http://dx.doi.org/10.1201/9781420059861.ch5.
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"Landscape Influences on Stream Habitats and Biological Assemblages." In Landscape Influences on Stream Habitats and Biological Assemblages, edited by Lizhu Wang, Paul W. Seelbach, and Robert M. Hughes. American Fisheries Society, 2006. http://dx.doi.org/10.47886/9781888569766.ch1.
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<em>Abstract.</em>—Viewing river systems within a landscape context is a relatively new and rapidly developing approach to river ecology. Although the linkages among landscapes and associated physicochemical and biological characteristics of rivers have long been recognized, the development of conceptual frameworks and tools for measuring and synthesizing such linkages is relatively recent. In this book, authors from the United States and Canada explore new ideas about landscape–river relationships, river research, and river management; compile large regional, spatially referenced, survey data sets on river network characteristics; explore and describe patterns and relationships across survey sites, reaches, and catchments; and develop management and decision tools. In synthesizing these chapters, we have identified key challenges to studying and managing landscape–river systems. Key challenges include identifying appropriate units of measurement and interpretation of the river network, understanding how human alterations of land cover modify river characteristics and biological assemblages, understanding and measuring how various spatial-scale factors interactively influence instream habitat and biota, and collecting and gathering appropriate landscape and instream habitat data. This book also reveals the major current knowledge gaps that deserve more attention in landscape–river ecology. These include improving river–landscape classification, capturing appropriate spatial- and temporal-scale data, developing accurate predictive models where study data are limited, and improving our ability to measure connectivity among river segments and their networks. Future research that focuses on overcoming the challenges and filling the knowledge gaps will substantially improve our understanding of river ecosystems, fuel the development of tools for linking the functions and processes operating at different spatial- and temporal-scales, and stimulate the development of new hypotheses and frameworks to provide foundations for the next phases of riverine science and management.
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"Community Ecology of Stream Fishes: Concepts, Approaches, and Techniques." In Community Ecology of Stream Fishes: Concepts, Approaches, and Techniques, edited by Marco A. Rodríguez. American Fisheries Society, 2010. http://dx.doi.org/10.47886/9781934874141.ch12.
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<em>Abstract</em>.—Long-distance dispersal (LDD; relatively infrequent displacements occupying the tails of the dispersal kernel) and habitat connectivity (the degree to which the landscape facilitates or impedes movement among resource patches) influence many important ecological processes. These processes include population spread and redistribution, regulation of local and regional population dynamics, colonization of newly available habitats, maintenance of diversity in variable environments, and transfer of energy and nutrients. Field studies have shown that both LDD and instream barriers can have marked effects on the distribution patterns and demographic isolation of stream fishes at various spatial scales. Traditional summary measures of spatial use at the individual level, such as home ranges, have limited utility for examining the effects of connectivity in the presence of LDD or instream barriers; however, simple models can be tailored to extract and synthesize this information efficiently. This study presents a modeling framework for quantifying LDD of marked fish as well as their movements in the presence of barriers of differing porosity or permeability. Simulations are used to illustrate the feasibility of the modeling approach and explore sample size and spatial scale requirements. Comparison of model parameters across systems, species, and time periods should provide insights into the contribution of movement to structuring fish communities in riverine landscapes. The proposed framework can help improve on methods currently used (e.g., to quantify characteristic scales of habitat use by using median displacements or other appropriate percentile measures instead of home ranges and to relate fish movements to environmental or individual predictors by robust analyses based on heavy-tailed rather than simple normal distributions).
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"Riverine landscapes: Ecology for an alternative geometry." In Spatial Ecology, 107–22. Chapman and Hall/CRC, 2009. http://dx.doi.org/10.1201/9781420059861-10.
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"Community Ecology of Stream Fishes: Concepts, Approaches, and Techniques." In Community Ecology of Stream Fishes: Concepts, Approaches, and Techniques, edited by Alexander S. Flecker, Peter B. McIntyre, Jonathan W. Moore, Jill T. Anderson, Brad W. Taylor, and Robert O. Hall. American Fisheries Society, 2010. http://dx.doi.org/10.47886/9781934874141.ch28.
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<em>Abstract</em>.—Migratory fishes are common in freshwaters throughout the world and can fundamentally alter recipient ecosystems. We describe different types of fish migrations and consider their importance from the perspective of ecosystem subsidies—that is, landscape-scale flows of energy, materials, and organisms that are important in driving local food web and ecosystem dynamics. We distinguish between two general categories of subsidies, which we term here material subsidies and process subsidies. Material subsidies are the transfer of energy, nutrients, and other resources resulting in direct changes in resource pools within ecosystems. We posit that material subsidies occur under only a subset of life history strategies and ecological settings, and the potential for migratory fish to represent major material subsidies is greatest when (1) the biomass of migrants is high relative to recipient ecosystem size, (2) the availability of nutrients and energy is low in the recipient ecosystem (i.e., oligotrophic), and (3) there are effective mechanisms for both liberating nutrients and energy from migratory fishes and retaining those materials within the food web of the recipient ecosystem. Thus, anadromous semelparous Pacific salmon <em>Oncorhynchus </em>spp. with en masse programmed senescence in oligotrophic Pacific Northwest streams can be large material subsidies. In contrast, process subsidies arise from feeding or other activities of migratory species that directly affect process rates within recipient ecosystems. For example, the physical and chemical effects of grazing and sediment-feeding fishes such as prochilodontids, as well as seed dispersal by large-bodied frugivorous characins, represent potentially key process subsidies by migratory fishes in some of the great rivers of South America. We speculate that process subsidies are more widespread than material subsidies from migratory stream fishes because they are independent of the type of migration patterns, life history, and distance traveled. Nevertheless, the magnitude of process subsidies is likely to be greatest under a specific subset of ecological conditions, which can differ from those where material subsidies might be most important. In addition to migrant biomass, the potential for migratory fish to represent strong process subsidies is regulated by migrant interaction strength and the degree to which a migratory species is functionally unique in a particular ecological setting. Unlike material subsidies, which require high migrant biomass as conveyor belts of materials, migratory fishes can be crucial process subsidies, even when migrant biomass is low, if they are functionally unique and strong interactors. We provide specific examples of these different types of subsidies and outline key directions of research for furthering our understanding of the functional significance of migratory stream fishes. Our aim is to highlight the diversity of subsidies provided by migratory fishes in order to foster a more comprehensive perspective on fishes as essential components of riverine ecosystems.
Conference papers on the topic "RIVERINE LANDSCAPE ECOLOGY"
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Ya-hui, Zheng, Wang Yi-ping, Liu Chun-ru, and Zhang Ying. "Study on landscape ecology compensatory design of old urban riverside area." In 2011 International Conference on Consumer Electronics, Communications and Networks (CECNet). IEEE, 2011. http://dx.doi.org/10.1109/cecnet.2011.5769126.
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Liling Xia. "Discussion about the ecology landscape pattern design of riverside hilly urban water system based on corridor theory." In 2010 2nd International Conference on Information Science and Engineering (ICISE). IEEE, 2010. http://dx.doi.org/10.1109/icise.2010.5691911.
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