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Academic literature on the topic 'Benthic invertebrate community'

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Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Benthic invertebrate community"

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Wong, Allan HK, Donald J. McQueen, D. Dudley Williams, and Eric Demers. "Transfer of mercury from benthic invertebrates to fishes in lakes with contrasting fish community structures." Canadian Journal of Fisheries and Aquatic Sciences 54, no. 6 (June 1, 1997): 1320–30. http://dx.doi.org/10.1139/f97-035.

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We examined the flow of mercury (Hg) from benthic invertebrates to fishes in lakes with contrasting fish community structure. The study was carried out in two whole lakes in southcentral Ontario in 1992. Both were remote from direct sources of contamination and were chosen because of their physical and chemical similarities. Although the fish communities in the two lakes were qualitatively similar, the total number of fishes in Ranger Lake was an order of magnitude smaller than that in Mouse Lake. As a result of the lower net predation from benthivorous fishes, documented in earlier studies, Ranger Lake benthic invertebrate populations were significantly higher. However, benthic invertebrate taxa in Mouse Lake were generally larger and had higher Hg concentrations. This was partly attributed to the stunted growth of Mouse Lake fishes, which did not allow them to prey on larger benthos as a result of gape limitations. Despite the lower Hg concentrations in Ranger Lake benthos, total benthic invertebrate Hg pools were higher in this lake as a result of its higher total benthic invertebrate biomass. However, the transfer of total Hg from benthic invertebrates to fishes was higher in Mouse Lake due to the higher consumption rates of benthivorous fishes.
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Jackson, Donald A., and Harold H. Harvey. "Fish and Benthic Invertebrates: Community Concordance and Community–Environment Relationships." Canadian Journal of Fisheries and Aquatic Sciences 50, no. 12 (December 1, 1993): 2641–51. http://dx.doi.org/10.1139/f93-287.

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Fish and benthic invertebrates from 40 lakes in south-central Ontario showed significantly concordant patterns based on community structure. Fish communities were associated significantly with lake morphological characteristics, but were uncorrelated with water chemistry. Large, deep lakes differed from shallow lakes in their fish species, having richer faunas due to the additional cold-water species. Centrarchid species occurred more frequently in small, shallow lakes than in larger lakes. The invertebrate community was not correlated with lake morphology, but showed a significant association with water chemistry, principally lake pH. A strong contrast in the abundance of Chaoborus and Holopedium existed, but it was unclear whether this was due to a predator–prey relationship or to differences in acid tolerance. Although the lakes showed similar patterns in the composition of both communities, each community was associated with a different set of environmental factors. Biotic processes within and between communities explain this paradox in community–environment relationships. Such biotic interactions may involve direct processes such as fish predation on a particular invertebrate taxon or indirect factors, e.g., where fish limit the abundance of invertebrate predators, thereby limiting the impact of these invertebrate predators.
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Al-Ameen, Feryal A. M. "An Ecological Survey of Benthic Invertebrates in Three Sites in Shatt-Al-Kufa at Al-Najaf Province, Iraq." JOURNAL OF UNIVERSITY OF BABYLON for Pure and Applied Sciences 26, no. 8 (October 15, 2018): 230–39. http://dx.doi.org/10.29196/jubpas.v26i8.1691.

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The present study was conducted to determine the structure of benthic invertebrates community, as well as a study of some factors associated with water quality in Shatt Al-Kufa. The study was included a choice of three sites located along the Shatt Al-Kufa River, water samples and benthic invertebrates were collected during the period from February 2014 to January 2015. The abiotic study included measurements of chlorophyll a, salinity, total dissolved solids, biochemical oxygen demand, total hardness, nitrate, and sulfate. The biotic study included the determination the composition of the benthic invertebrates community through the study of the mean population density, the relative abundance index of these organisms and the Jaccard Coefficient was calculated to identify the value of similarity between the studied sites. In the present study, 28 taxa of benthic invertebrates were recorded belong to 4 main groups which are: 8 taxa belonged to Annelida, 7 belonged to Insecta, 10 belonged to Mollusca, 3 belonged to Nematoda. Annelida recorded the highest percentage 40.8% of the total number of benthic invertebrates, Insecta with 30.3%, Mollusca and Nematoda with 28.4 %, 0.5% respectively. Benthic invertebrate has shown positive and negative relationships with the studied physical and chemical characteristics.
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Bond, M. J., D. Rowan, R. Silke, and J. Carr. "Drivers of Abundance and Community Composition of Benthic Macroinvertebrates in Ottawa River Sediment near Chalk River Laboratories." AECL Nuclear Review 2, no. 2 (December 1, 2013): 41–54. http://dx.doi.org/10.12943/anr.2013.00017.

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The Ottawa River has received effluent from Chalk River Laboratories (CRL) for more than 60 years. Some radionuclides and contaminants released in effluents are bound rapidly to particles and deposited in bottom sediments where they may be biologically available to benthic invertebrates and other aquatic biota. As part of a larger ecological assessment, we assess the potential impact of contaminated sediments in the vicinity of CRL on local benthic community structure. Using bivariate and multivariate approaches, we demonstrate that CRL operations have had little impact on the local benthic community. Despite elevated anthropogenic radionuclide activity concentrations in sediment near CRL’s process outfall, the benthic community is no less abundant or diverse than what is observed upstream at background levels. The Ottawa River benthic invertebrate community is structured predominantly by natural physical and biological conditions in the sediment, specifically sediment water content and organic content. These natural habitat conditions have a stronger influence on macroinvertebrate communities than sediment contamination.
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Michiels, Iris C., and Walter Traunspurger. "Benthic community patterns and the composition of feeding types and reproductive modes in freshwater nematodes." Nematology 7, no. 1 (2005): 21–36. http://dx.doi.org/10.1163/1568541054192234.

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Abstract We characterised benthic invertebrate community composition in 11 oligotrophic, alpine lakes. Nematodes were the most abundant benthic taxa in most lakes but community composition differed markedly. Several relationships between the invertebrate taxa were found but there was no strong evidence that competition or predation shaped the benthic community structure. Most lakes were dominated by a few nematode species with cosmopolitan distribution. Obligate and/or facultative parthenogenetic species were most abundant. With increasing species richness, the overall sex-ratio increased and the relative abundance of parthenogenetic species decreased.
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Umar, D. M., J. S. Harding, and H. M. Chapman. "Response of benthic invertebrate communities to a land use gradient in tropical highland streams in Nigeria." Tropical Freshwater Biology 26, no. 1 (March 15, 2018): 53–76. http://dx.doi.org/10.4314/tfb.v26i1.5.

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Benthic invertebrate communities have been shown to respond to habitat degradation as a result of land use changes. Although these changes have been well documented in temperate regions, their effects in the tropics have been poorly documented particularly where land use activities differ markedly (e.g., tea, maize and plantations). A survey 55 1st and 2nd order highland tropical streams, across four land use categories, ranging from continuous tropical montane rain forest to intensive crops and pasture. Streams were sampled in the tropical dry season (October–March) for physico-chemical parameters and components of the biological community, (i.e., fine particulate organic matter [FPOM], coarse particulate organic matter [CPOM], algae and benthic invertebrates). Catchment riparian conditions and human water use activities were used to generate a multivariate land use intensity gradient score. Temperatures in pasture streams were warmer than forest streams (up to 25oC) and dissolved oxygen levels frequently low (15–79%). However, physico-chemical conditions did not show any clear patterns across land uses categories. In contrast, benthic invertebrate communities showed strong response with the highest taxonomic diversity in continuous forest streams (mean 20 taxa) and the lowest in streams with intensive crops (e.g., cabbage crops, mean 8 taxa). Marked changes were found in invertebrate communities with several taxa occurring primarily in forested streams (e.g., the mayflies Heptageniidae and Oligoneuriidae and brachyuran crabs). Tropical land use farming (e.g., tea, maize, cabbage) have significant impacts on the benthic invertebrate assemblages of highland streams in Nigeria. However, not all crop and plantation streams had highly impacted communities because some have wider riparian buffer zones. This study further highlight the importance of conservation and management of montane forest fragments in these regionsKeywords: Tropical, Nigeria, highland, benthic invertebrates, land use, degradation
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Têtu, Catherine, Sean Mitchell, Charles MacInnis, and Barry R. Taylor. "Restoration of a Nova Scotia stream to enhance Atlantic salmon provides few benefits to benthic invertebrates." Proceedings of the Nova Scotian Institute of Science (NSIS) 48, no. 2 (May 7, 2016): 211. http://dx.doi.org/10.15273/pnsis.v48i2.6656.

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Stream restoration is often undertaken with the goal of improving habitat for one focal species, most often a salmonid fish such as trout or salmon. Improvements in channel structure, especially the flushing of silt from sediments, should also benefit benthic invertebrate communities, but studies to date suggest substantial changes in benthic communities following restoration are not common. In a third-order Nova Scotia stream, we examined the effect of successful restoration to improve habitat for spawning Atlantic salmon on benthic invertebrate communities at sites where clogging of the bottom cobble with fine silt had been alleviated. In a long-term comparison of two restored sites and two degraded sites, only six of 24 insect taxa showed increased population density five or seven years after restoration. In a second comparison of a comparatively undisturbed site against a newly restored site and a site restored eight years earlier, only three invertebrate taxa appeared to respond positively and consistently to restoration. In both studies there were no substantial changes in total invertebrate density, taxa richness, Simpson’s diversity index or other community metrics over five years, except for a decline in the EPT/Chironomids ratio in the second study. Ordination of sites by correspondence analysis showed that, in both studies, benthic communities at unrestored control sites and restored sites were clearly different and did not become more similar through time. A long-term restructuring of the benthic community in the entire brook is suggested by the appearance of silt-intolerant shredders (Lepidostoma, Leuctra) among the most abundant members of the benthos in the second study, replacing silt-tolerant collectors (Tricorythodes, Optioservus) that dominated the earlier study. Habitat factors unaffected by in-stream restoration (frequent high discharge, lack of woody debris) limit benthic communities more than substratum quality.
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Basu, Arnab, Indrani Sarkar, Siddartha Datta, and Sheela Roy. "Community structure of benthic macroinvertebrate fauna of river Ichamati, India." Journal of Threatened Taxa 10, no. 8 (July 26, 2018): 12044. http://dx.doi.org/10.11609/jott.3439.10.8.12044-12055.

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Benthic macroinvertebrate communities are frequently applied as indicators of aquatic ecosystem health as many species are responsive to pollution and abrupt changes in their surroundings. The qualities of benthic invertebrate communities greatly depend on habitat conditions. Thus the diversity in benthic community varies with different habitat conditions. This investigation on the structure of the benthic invertebrate communities was conducted on river Ichamati, a trans-boundary river between India and Bangladesh to assess the cumulative effects of water quality on the aquatic biota. The study period extended from February 2011 to January 2014 at three sites from Majdiah to Hasanabad (in West Bengal, India) a stretch of 124km. A total of 23 macrobenthic species belonging to three phyla, five classes and nine orders were identified. Fifteen species of benthic invertebrates belonging to Mollusca, three species under Annelida and five species under Arthropoda were found. The highest abundance density (3633.33 indiv.m-2) and species richness (18 species) were recorded up-stream (Majdiah) where marginal habitats covered by macrophytes were significantly higher than at other sites. Both the organic carbon (4.41±1.11) and organic matter (7.48±1.56) of soil at this site were the maximum thus influencing the richness of benthic macroinvertebrate communities. Hydrological variables, viz, dissolved oxygen, pH, alkalinity; hardness, salinity, nutrients, calcium, and magnesium were studied to determine their influences on the benthic community in the upper, middle- and down-streams of the river, respectively. Shannon’s diversity index (0.95–2.07; 0.00–0.72; 0.00–0.64), dominance index (0.57–0.86; 0.00–0.44; 0.00–0.44), evenness index (0.72–0.95; 0.61–1.00; 0.00–1.00), Margalef index (0.72–2.23; 0.00–1.32; 0.00-0.28) of the upper, middle- and down-streams were calculated. Benthic macroinvertebrate density was correlated with hydrological variables which indicated that the abiotic factors had either direct or inverse influence on the richness and abundance; however, the abiotic factors did not correlate identically in all three sites.
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Metzeling, L. "Benthic macroinvertebrate community structure in streams of different salinities." Marine and Freshwater Research 44, no. 2 (1993): 335. http://dx.doi.org/10.1071/mf9930335.

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The likely effect of salinization on stream invertebrates was studied by comparing macroinvertebrate community structure at nine sites in six lowland, perennially flowing streams. The salinity of these streams ranged from 51 to 1100 mg L-1 total dissolved solids (TDS) (and were historically higher, up to about 2000 mg L-1 TDS). There was no correlation between either number of taxa or faunal abundance with salinity. However, multivariate analyses showed distinct invertebrate communities associated with different salinities. Fidelity analysis identified groups of taxa associated with either low or high salinity. Existing information on the distribution of the common taxa within these groups indicated that they were tolerant of wider ranges in salinity than those found in this study. The rare taxa most clearly distinguished between sites of different salinities and are possibly more sensitive to changes in salinity.
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Parker, Roy, and Charles Dumaresq. "Effluent Characterization, Water Quality Monitoring and Sediment Monitoring in the Metal Mining EEM Program." Water Quality Research Journal 37, no. 1 (February 1, 2002): 219–28. http://dx.doi.org/10.2166/wqrj.2002.014.

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Abstract The metal mining Environmental Effects Monitoring (EEM) program will require mines to conduct effluent characterization and water quality monitoring on an ongoing basis. Samples will be collected four times a year, and will be analyzed for a range of parameters. This information will be used to aid in the design and interpretation of fish surveys and benthic invertebrate community surveys. There are also a number of water quality monitoring methods that may be used to help determine the cause of any effects identified by the EEM program. Mines will also be required to collect sediment samples for determination of particle size distribution and total organic carbon. This information will be used in the design and interpretation of benthic invertebrate community surveys. A range of sediment monitoring techniques are available to aid in the determination of the causes of effects on the benthic invertebrate community.
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Dissertations / Theses on the topic "Benthic invertebrate community"

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Laureta, L. V. "Trophic dynamics of a benthic community, with particular reference to the ecological energetics of Corbula gibba (Olivi)." Thesis, University of Liverpool, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.381336.

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Bennett, Barbara Loraine Jr. "Land use influences on benthic invertebrate assemblages in southern Appalachian agricultural streams." Thesis, Virginia Tech, 1998. http://hdl.handle.net/10919/36940.

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I investigated the role of land use in structuring benthic invertebrate assemblages in agricultural streams in the French Broad River drainage in western North Carolina. I sampled six agricultural streams (3 with cleared headwaters and 3 with forested headwaters) at three points along a gradient (headwaters, a midpoint, and a downstream site). At each site, I measured a variety of physico-chemical parameters, including temperature, chlorophyll a, discharge, nutrients, and suspended solids. Invertebrates were sampled at all sites in October 1996 and April 1997. Riparian vegetation was assessed for each site at mutiple spatial scales using GIS data from the 1950s, 1970s, and 1990s. Forested agricultural (FA) streams had more riparian vegetation than cleared agricultural (CA) streams in both the 1950s and the 1970s. Cleared agricultural streams had less organic matter, more primary production, higher nitrates, and warmer temperatures than FA streams. Total and EPT taxa richness was greater in FA streams. Pollution-sensitive Plecoptera were relatively more abundant in FA streams, while tolerant Diptera were more abundant in CA streams. High diversity and Plecoptera abundance was related to high habitat quality, more riparian vegetation, low nitrates, and low summer temperatures. Higher invertebrate diversity was related to the land use 25-50 years as well as the current land use (forested, moderate agriculture, or heavy cattle impact). These results indicate a long-term legacy of agricultural influences on stream invertebrate assemblages.
Master of Science
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Wells, Elizabeth Hamilton. "Evolutionary novelty and naivete in invertebrate predator-prey interactions in a benthic marine community." Thesis, University of California, Davis, 2013. http://pqdtopen.proquest.com/#viewpdf?dispub=3565574.

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In the first chapter of this dissertation, I explore the role of shared evolutionary history in determining predation preferences of a suite of three generalist muricid whelks preying on oysters and mussels. Various theories such as the enemy release and novel weapons hypotheses predict how evolutionary novelty will affect predator-prey interactions, but it is not clear how applicable these theories are to interactions between generalist predators and familiar prey types. In addition to determining whether the one native and two invasive whelks preferred to consume evolutionarily familiar or novel oysters and mussels, I determined the optimality of each prey species via metrics such as food reward, ease of predation (shell thickness), and food:handling time ratios. By explicitly asking if predation hierarchies mirrored optimality, I was able to determine whether evolutionary constraints were preventing the whelks from consuming prey that were more optimal.

In the second chapter of the dissertation, I asked whether there had been post-invasive changes in predation preferences for one of the invasive whelks used in the first chapter, the Eastern oyster drill Urosalpinx cinerea. The results of this study, which indicate that even highly generalist invasive predators consuming a familiar prey type can experience post-invasion changes in naïveté and predation preference strength, serve as a reminder that a potential or new invader's interactions with and impact on species in the recipient community can be hard to predict.

The third chapter of this dissertation documents the loss of an invasive predator's naïveté towards new species prey in real time, and compares the two prey species' behavioral and morphological responses to both general and specific predation cues. I studied the predator-prey dynamics of the invasive European green crab Carcinus maenas and two species of snails, both of which are invasive on the Pacific coast of North America: the Eastern mud snail Ilyanassa obsoleta and the Asian hornsnail Batillaria attramentaria.The results of this research lead me to conclude that, as with the results of Chapter 2, even generalist predators are capable of losing naïveté to new prey and of changing prey preferences following relatively short exposure to new prey. In addition, this research indicates that between species that do not share an evolutionary history, CEs may be very quick to develop, while NCEs that are induced by predator cues may not be like NCEs between evolutionarily familiar species, and may augment the CEs. (Abstract shortened by UMI.)

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Wright, Sara E. "Spatial structuring of benthic invertebrate communities within and among wooded headwater stream networks." Youngstown State University / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=ysu1329070085.

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Calder-Potts, Ruth Naomi. "The biological and ecological impacts of hypoxia on coastal benthic communities." Thesis, University of Plymouth, 2017. http://hdl.handle.net/10026.1/9352.

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Traditionally, hypoxia has been defined as the situation where DO levels have fallen below 2.0 mg O2 L-1, but increasing evidence suggests that this low level of DO is inadequate to describe the onset of hypoxia impacts for many organisms. Consequently, there is a need for a greater understanding of how ‘moderate’ alterations in DO levels will affect ecosystem processes and functionality, specifically through behavioural and physiological alterations at the organism and community level. This thesis reports on mesocosm experiments which were conducted to examine the effects of moderate ( > 3.0 mg O2 L-1) hypoxia on firstly, a key ecosystem engineer, the brittlestar Amphiura filiformis, and secondly, on the Station L4 infaunal macrobenthic community. Station L4 is a longstanding marine biodiversity and MSFD reference site and forms part of the Western Channel Observatory. At the organism level, short-term (14 d) exposure to moderate hypoxia significantly reduced oxygen uptake rates, oocyte diameter and oocyte development in A. filiformis. However, these physiological affects occurred irrespective of brittlestar population density. Additionally, moderate hypoxia reduced brittlestar activity, in terms of bioturbation behaviour, consequentially having an effect on ammonium and silicate fluxes. These observations were only detected when brittlestar population density was high. It was concluded that denser populations of A. filiformis may therefore exhibit the greatest changes in behaviour and shifts in ecosystem function as competition for resources and oxygen heightens. The benthic community at Station L4, displayed considerable tolerance to medium-term (6 wk.) exposure to moderate hypoxia, in terms of structure, diversity and bioturbatory behaviour, but these results may be different if exposure was longer or more severe. Alterations in nutrient fluxes were detected, but there was little evidence to suggest these changes were due to macrofaunal behavioural alterations. Additionally, results from this study revealed that bringing complex natural communities into the mesocosm caused a substantial loss of individuals and species, mainly due to translocation and disturbance effects. This important insight into the effects of bringing community assemblages into the mesocosm confirms that even with a loss of diversity, the L4 community maintained functionality and was resilient to alterations in DO. This suggests that the L4 benthic community does not depend on any one specific species for the provision of important ecosystem processes, resulting in considerable functional resilience within the L4 system. However, vulnerability to benthic systems may increase if functionality is dominated by species such as A. filiformis. Consequently, moderate hypoxia may not immediately affect benthic communities in terms of structure and diversity, but the physiological effects on individuals, especially to reproductive development, may cause alterations in the quality and quantity of planktonic propagules supplied by benthic species to the pelagic environment. This could affect benthic community diversity and functionality in the long term if repeated hypoxic events occur.
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Pohe, Stephen Robert. "Aquatic invertebrate fauna of Matapouri, Northland." Click here to access this resource online, 2008. http://hdl.handle.net/10292/425.

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A study of the aquatic invertebrate communities from two locations (Location 1 and Location 2) within the Matapouri catchment in Northland, New Zealand, was conducted to assess community structure in differing local-scale habitats. Four data collection methods were utilised generating 33,058 adult or larval invertebrates. The sampling methods comprised benthic kick-sampling, sticky trapping, light trapping, and emergence trapping. For the sticky trapping and light trapping, sampling was carried out at three different sites (Sites 1–3) within each location. The sites were situated within three habitat types; native forest, native forest-fringe, and raupo wetland. Emergence trapping also commenced within the three sites, at both locations, but was discontinued after two months, due to the equipment being destroyed by consecutive flooding events (method described in Appendix 1). Benthic sampling was carried out within the Forest and Forest-fringe habitats. Benthic sampling, sticky trapping, and light trapping were carried out following a monthly schedule between June and November 2005. Conductivity, pH, and water temperature measurements were taken concurrently with benthic sampling on a monthly basis, while water velocity and substrate measurements were taken once to assist in habitat characterisation. Overall, 71 taxa were recorded by benthic sampling over the six month period, with a mean of approximately 30 taxa per site per month. In comparison with similar studies elsewhere in New Zealand, a figure of around 30 taxa per sample was high. The benthic macroinvertebrate fauna at all sites was dominated by Trichoptera (19 taxa), Diptera (16 taxa) and Ephemeroptera (10 taxa). This pattern of diversity is similar to that reported in other New Zealand studies. However, in contrast to previous studies, the leptophlebiid mayfly genus Deleatidium was not numerically dominant over the rest of the community, and other leptophlebiid genera (Acanthophlebia, Atalophlebioides, Mauiulus and Zephlebia) were equally represented, possibly reflecting niche partitioning between the groups. The genus Nesameletus was not recorded at any site, despite being one of the core mayfly species in New Zealand streams. The rare mayfly Isothraulus abditus was recorded at one of the forest locations. There are no published records of this species from Northland. Although acknowledged as another of the core New Zealand benthic taxa, the hydropsychid caddisfly Aoteapsyche was not recorded during the study. However, another hydropsychid, Orthopsyche, was commonly recorded, and these may be filling a similar niche to the Aoteapsyche genus. In contrast to the Trichoptera, Diptera, and Ephemeroptera, the Plecoptera fauna was relatively depauperate, probably reflecting the warmer climate of the region and lack of temperature-buffered spring-fed streams. Surprisingly, Zelandobius, a core New Zealand genus, was absent but is regularly recorded in Northland. A species of conservation interest, Spaniocercoides watti, currently recognised as a Northland endemic, was recorded in low numbers. There were no apparent trends in diversity or abundance of benthic invertebrates over time. Also, there were no significant differences in species diversity between the two locations. However, in many cases, taxa were more abundant at Location 2. This may have been due to steeper gradients at Location 2, and the consequent effects on substrate size and streambed stability, as all other physical factors appeared similar between locations. Although several significant differences of individual benthic taxa were recorded, no broad effect of habitat (sites) on species diversity was observable. However, at Location 2, abundances were significantly higher at Site 3 (Forest) compared to Site 2 (Forest-fringe). The reasons were uncertain, but may be attributed to higher retention of allochthonous organic materials, trapped by in-stream cover and larger substrates. Investigations of adult stages by sticky traps supported benthic results recording community compositions and abundances dominated by Trichoptera and Diptera. Plecoptera were poorly represented. Location 2 recorded higher abundances of taxa, particularly Ephemeroptera and Plecoptera. Investigations of adult stages by light traps however did not produce any statistically significant differences in abundances between sites, between locations, or between sites across locations, and it is believed to be due to limited sampling replication combined with some biases of light trapping. This study indicates that the aquatic invertebrate community at Matapouri is diverse but also reasonably representative. Several rare or uncommon insects inhabit the catchment. It is therefore important that Iwi and the local Landcare Group, who invited and supported this research, together with the Department of Conservation, continue their efforts in protecting these areas. The resident fauna have the capacity to restock areas downstream, which are intended to be improved and restored through sediment control and riparian management.
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Durkota, Jessica M. "Groundwater ecology : invertebrate community distribution across the benthic, hyporheic and phreatic habitats of a chalk aquifer in southeast England." Thesis, University College London (University of London), 2018. http://discovery.ucl.ac.uk/10040830/.

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Groundwater is an important resource for drinking water, agriculture, and industry, but it also plays an essential role in supporting the functioning of freshwater ecosystems and providing habitat for a number of rare species. However, despite its importance, groundwater ecology often receives little attention in environmental legislation or research. This study aims to improve our understanding of the organisms living in groundwater-dependent habitats and the influence of environmental conditions on their distribution. Invertebrate communities occurring in the benthic, hyporheic and phreatic habitats were surveyed at twelve sites over four years across the Stour Chalk Block, a lowland catchment in southern England. A diverse range of stygoxenes, stygophiles and stygobionts, including the first record of Gammarus fossarum in the British Isles, were identified using morphological and molecular techniques. The results indicate that under normal conditions, each habitat provided differing environmental conditions which supported a distinctive invertebrate community. While the community recorded in the benthic habitat was characterised by a diverse assemblage of surface water species typical of Chalk streams, the phreatic community comprised a small number of exclusively crustacean stygofauna (such as Niphargus kochianus and Crangonyx subterraneus) and the hyporheic habitat supported a mixture of surface and groundwater species. Surprisingly, the results indicate that some species, such as Agapetus fuscipes (normally considered a surface water taxon), move into the hyporheic habitat in a predictable, seasonal pattern, potentially in response to grazing opportunities. However, the results collected during the high and low flow events which occurred during this study also show the widespread movement of multiple species (such as Gammarus pulex and Niphargus fontanus) between habitats in response to environmental disturbance. Collectively, these results reflect the movement of fauna longitudinally, laterally and vertically over time throughout the catchment, as though along a continuum rather than between three separate habitats. This suggests that our conceptualisation of lotic functioning should be expanded to better integrate the contribution from groundwater. The approach taken by this study provides a greater understanding of the full diversity of aquatic invertebrates within this catchment and the way in which their distribution fluctuates across habitats. This study is one of the first to concurrently assess invertebrate distribution across the benthic, hyporheic and phreatic habitats; in addition, the relatively frequent and long-term sampling approach also facilitated a more detailed temporal assessment of these communities. A greater understanding of the distribution and requirements of the fauna inhabiting groundwater-dependent habitats, and their response to environmental change is essential for the conservation of these species and management of lotic ecosystems.
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Gumede, Sabelo Victor. "A study of benthic invertebrate community structure in selected areas on the continental shelf off KwaZulu-Natal, South Africa." Master's thesis, University of Cape Town, 2001. http://hdl.handle.net/11427/6261.

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McChesney, Stephen. "The benthic invertebrate community of the intertidal mudflat at the Mai Po Marshes Nature Reserve, with special reference to resources formigrant shorebirds." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1997. http://hub.hku.hk/bib/B31214435.

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McChesney, Stephen. "The benthic invertebrate community of the intertidal mudflat at the Mai Po Marshes Nature Reserve, with special reference to resources for migrant shorebirds /." Hong Kong : University of Hong Kong, 1997. http://sunzi.lib.hku.hk/hkuto/record.jsp?B18061977.

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Books on the topic "Benthic invertebrate community"

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Fox, Richard S. Shallow-water marine benthic macroinvertebrates of South Carolina: Species identification, community composition, and symbiotic associations. Columbia, S.C: Published for the Belle W. Baruch Institute for Marine Biology and Coastal Research by the University of South Carolina, 1985.

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Lenz, Bernard N. Feasibility of combining two aquatic benthic macroinvertebrate community databases for water-quality assessment. [Middleton, WI]: U.S. Department of the Interior, U.S. Geological Survey, 1997.

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Lenz, Bernard N. Feasibility of combining two aquatic benthic macroinvertebrate community databases for water-quality assessment. [Middleton, WI]: U.S. Department of the Interior, U.S. Geological Survey, 1997.

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Lenz, Bernard N. Feasibility of combining two aquatic benthic macroinvertebrate community databases for water-quality assessment. [Middleton, WI]: U.S. Department of the Interior, U.S. Geological Survey, 1997.

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Arthur, Allan. Sediment and benthic community assessment of the St. Marys River. Toronto, ON: Queen's Printer for Ontario, 2000.

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Jackson, Donald Andrew. Fish and benthic invertebrate communities: analytical approaches and community-environment relationships. 1992.

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Hachmöller, Bernard. The benthic macroinvertebrate community in Padden Creek, summer 1988. 1989.

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Tennessee Valley Authority. River Basin Operations. and Tennessee Valley Authority. Water Resources., eds. Reservoir vital signs monitoring - 1990: Benthic macroinvertebrate community results. Chattanooga, Tenn: Tennessee Valley Authority, Resource Group, River Basin Operations, Water Resources, 1991.

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Tennessee Valley Authority. River Basin Operations. and Tennessee Valley Authority. Water Resources., eds. Reservoir vital signs monitoring - 1991: Benthic macroninvertebrate community results. Chattanooga, Tenn: Tennessee Valley Authority, Resource Group, River Basin Operations, Water Resources, 1992.

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Tennessee Valley Authority. River Basin Operations and Tennessee Valley Authority. Water Resources, eds. Reservoir vital signs monitoring - 1990: Benthic macroninvertebrate community results. Chattanooga, Tenn: Tennessee Valley Authority, Resource Group, River Basin Operations, Water Resources, 1991.

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Book chapters on the topic "Benthic invertebrate community"

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Silva, Gilda, José Lino Costa, Pedro Raposo de Almeida, and Maria José Costa. "Structure and dynamics of a benthic invertebrate community in an intertidal area of the tagus estuary, western portugal: a six year data series." In Marine Biodiversity, 115–28. Dordrecht: Springer Netherlands, 2006. http://dx.doi.org/10.1007/1-4020-4697-9_10.

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Oswood, Mark W. "Community structure of benthic invertebrates in interior Alaskan (USA) streams and rivers." In High Latitude Limnology, 97–110. Dordrecht: Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-009-2603-5_8.

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Wolfram, Georg, Karl Donabaum, Michael Schagerl, and Verena A. Kowarc. "The zoobenthic community of shallow salt pans in Austria — preliminary results on phenology and the impact of salinity on benthic invertebrates." In Shallow Lakes ’98, 193–202. Dordrecht: Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-017-2986-4_21.

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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 Keith B. Gido, Katie N. Bertrand, Justin N. Murdock, Walter K. Dodds, and Matt R. Whiles. American Fisheries Society, 2010. http://dx.doi.org/10.47886/9781934874141.ch29.

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<em>Abstract</em>.—Stream fishes can have strong top-down and bottom-up effects on ecosystem processes. However, the dynamic nature of streams constrains our ability to generalize these effects across systems with different disturbance regimes and species composition. To evaluate the role of fishes following disturbance, we used a series of field and mesocosm experiments that quantified the influence of grazers and water column minnows on primary productivity, periphyton structure, organic matter pools, and invertebrate communities following either scouring floods or drying of prairie streams. Results from individual experiments revealed highly significant effects of fishes, but the direction or magnitude of effects varied among experiments. Meta-analyses across experiments indicated that grazers consistently reduced the relative amount of fine benthic organic matter (FBOM) and chironomid abundance within 2 weeks after disturbances. However, effect sizes (log response ratios) were heterogeneous across experiments for algal biomass and algal filament lengths measured more than 4 weeks after a disturbance and potentially associated with system productivity and grazer densities. A similar analysis of 3–4 experiments using water column minnows only found a consistent trend of decreasing FBOM in fish treatments relative to controls when measured less than 2 weeks after disturbances and increase in gross primary productivity measured more than 4 weeks after disturbance. These results, along with those of others, were used to develop a conceptual framework for predicting the potential role of fishes in streams following disturbances (flood and drying). Both theoretical and empirical research shows that recovery of stream ecosystem processes will depend on the resilience of autotrophic and heterotrophic communities following disturbance. Fish effects may vary among functional groups but are generally predicted to be greatest during early stages of succession when algal and invertebrate communities are less complex and their biomass is low relative to fish biomass. Our analysis underscores the context dependency of consumer effects on ecosystem structure and function in nonequilibrium conditions and suggests that factors regulating fish densities and colonization of algal and invertebrate taxa need to be evaluated to predict the consequences of biodiversity loss in streams with variable or human-modified disturbance regimes.
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"Island in the Stream: Oceanography and Fisheries of the Charleston Bump." In Island in the Stream: Oceanography and Fisheries of the Charleston Bump, edited by E. L. Wenner and C. A. Barans. American Fisheries Society, 2001. http://dx.doi.org/10.47886/9781888569230.ch10.

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<em>Abstract</em>.—The geological structure and characteristic community members of four relatively distinct benthic habitats, and their associated subhabitats, are described on the upper- and middle-continental slope just north of the Charleston Bump and below the deflection of the Gulf Stream eastward. The predominant habitats, identified from submersible surveys, included moderate-relief capped mounds, moderate-relief coral mounds, low-relief substrates and cohesive-mud substrates. Moderaterelief capped-mound habitats (185–220 m) due east of Charleston, South Carolina, were characterized by high local relief (about 20 m) outcroppings having abundant and diverse fish and sessile invertebrate communities. Moderate-relief coral-mound habitats, at depths of 503–555 m southeast of Charleston, consisted of mounds of dead coral fragments with a local relief of 15–23 m. Associated with the coral mounds was a depauperate assemblage of live coral and rare fish species. Yet, this habitat had a more diverse biological community than most of the low-relief subhabitats. Low–relief habitats at 293–567 m southeast of Charleston primarily consisted of fine sediments distributed in current generated patterns. Although epibenthic fish and invertebrate species were associated with this habitat, their abundance and diversity was relatively low. Cohesive-mud habitats at 150–250 m were distributed along depth contours for a long distance. Many of the species found here were associated with widely distributed tilefish <em> Lopholatilus chamaeleonticeps </em>burrows that impart negative relief to large areas of this flat habitat.
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Reports on the topic "Benthic invertebrate community"

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Bowles, David, Michael Williams, Hope Dodd, Lloyd Morrison, Janice Hinsey, Tyler Cribbs, Gareth Rowell, Michael DeBacker, Jennifer Haack-Gaynor, and Jeffrey Williams. Protocol for monitoring aquatic invertebrates of small streams in the Heartland Inventory & Monitoring Network: Version 2.1. National Park Service, April 2021. http://dx.doi.org/10.36967/nrr-2284622.

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The Heartland Inventory and Monitoring Network (HTLN) is a component of the National Park Service’s (NPS) strategy to improve park management through greater reliance on scientific information. The purposes of this program are to design and implement long-term ecological monitoring and provide information for park managers to evaluate the integrity of park ecosystems and better understand ecosystem processes. Concerns over declining surface water quality have led to the development of various monitoring approaches to assess stream water quality. Freshwater streams in network parks are threatened by numerous stressors, most of which originate outside park boundaries. Stream condition and ecosystem health are dependent on processes occurring in the entire watershed as well as riparian and floodplain areas; therefore, they cannot be manipulated independently of this interrelationship. Land use activities—such as timber management, landfills, grazing, confined animal feeding operations, urbanization, stream channelization, removal of riparian vegetation and gravel, and mineral and metals mining—threaten stream quality. Accordingly, the framework for this aquatic monitoring is directed towards maintaining the ecological integrity of the streams in those parks. Invertebrates are an important tool for understanding and detecting changes in ecosystem integrity, and they can be used to reflect cumulative impacts that cannot otherwise be detected through traditional water quality monitoring. The broad diversity of invertebrate species occurring in aquatic systems similarly demonstrates a broad range of responses to different environmental stressors. Benthic invertebrates are sensitive to the wide variety of impacts that influence Ozark streams. Benthic invertebrate community structure can be quantified to reflect stream integrity in several ways, including the absence of pollution sensitive taxa, dominance by a particular taxon combined with low overall taxa richness, or appreciable shifts in community composition relative to reference condition. Furthermore, changes in the diversity and community structure of benthic invertebrates are relatively simple to communicate to resource managers and the public. To assess the natural and anthropo-genic processes influencing invertebrate communities, this protocol has been designed to incorporate the spatial relationship of benthic invertebrates with their local habitat including substrate size and embeddedness, and water quality parameters (temperature, dissolved oxygen, pH, specific conductance, and turbidity). Rigid quality control and quality assurance are used to ensure maximum data integrity. Detailed standard operating procedures (SOPs) and supporting information are associated with this protocol.
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