scholarly journals Effects of land use on benthic macroinvertebrate communities: Comparison of two mountain streams in Korea

2011 ◽  
Vol 47 ◽  
pp. S35-S49 ◽  
Author(s):  
Yung-Chul Jun ◽  
Nan-Young Kim ◽  
Soon-Jik Kwon ◽  
Seung-Chul Han ◽  
In-Chul Hwang ◽  
...  
Keyword(s):  
Land Use ◽  
Mountain Streams ◽  
Benthic Macroinvertebrate ◽  
Macroinvertebrate Communities ◽  
Effects Of Land Use

scholarly journals Assessing Spatial Distribution of Benthic Macroinvertebrate Communities Associated with Surrounding Land Cover and Water Quality

2019 ◽  
Vol 9 (23) ◽  
pp. 5162 ◽  
Author(s):  
Dong-Kyun Kim ◽  
Hyunbin Jo ◽  
Kiyun Park ◽  
Ihn-Sil Kwak
Keyword(s):  
Water Quality ◽  
Land Use ◽  
Spatial Distribution ◽  
Benthic Macroinvertebrates ◽  
Benthic Community ◽  
Benthic Macroinvertebrate ◽  
Macroinvertebrate Communities ◽  
Ambient Water ◽  
Accessible Information ◽  
The Impact

The study aims to assess the spatial distribution of benthic macroinvertebrate communities in response to the surrounding environmental factors related to land use and water quality. A total of 124 sites were surveyed at the Seomjin River basin in May and September 2017, respectively. We evaluated the abundance and composition of benthic macroinvertebrate communities based on nine subwatersheds. Subsequently, we compared the benthic information with the corresponding land use and water quality. To comprehensively explore the spatiotemporal distinction of benthic macroinvertebrate communities associated with those ambient conditions, we applied canonical correspondence analysis (CCA). The CCA results explicitly accounted for 61% of the explanatory variability; the first axis (45.5%) was related to land-use factors, and the second axis (15.5%) was related to water quality. As a result, the groups of benthic communities were distinctly characterized in relation to these two factors. It was found that land-use information is primarily an efficient proxy of ambient water quality conditions to determine benthic macroinvertebrates, such as Asellus spp., Gammarus spp., and Simulium spp. in a stream ecosystem. We also found that specific benthic families or genera within the same groups (Coleoptera, Diptera, Ephemeroptera, and Trichoptera) are also differentiated from ambient water quality changes as a secondary component. In particular, the latter pattern appeared to be closely associated with the impact of summer rainfall on the benthic community changes. Our study sheds light upon projecting benthic community structure in response to changes of land use and water quality. Finally, we conclude that easily accessible information, such as land-use data, aids in effectively characterizing the distribution of benthic macroinvertebrates, and thus enables us to rapidly assess stream health and integrity.

scholarly journals Variation of benthic macroinvertebrate communities in streams of three landscapes of South Brazilian grasslands

2020 ◽  
Vol 68 (1) ◽  
Author(s):  
Gabriela Galeti ◽  
Bruna Maria Capitanio ◽  
Ronei Baldissera
Keyword(s):  
Land Use ◽  
Macroinvertebrate Community ◽  
Benthic Macroinvertebrate ◽  
Functional Feeding Groups ◽  
Geographical Distance ◽  
Macroinvertebrate Communities ◽  
Conservation Units ◽  
Community Patterns ◽  
Lower Abundance ◽  
Guild Composition

Introduction: Aquatic ecosystems in southern Brazil are presently under great environmental pressure. Changes in land use result in negative impacts on the ecosystem, affecting the functioning of stream communities. Objective: To compare the benthic macroinvertebrate community richness, abundances and compositions in streams of three South Brazilian grassland landscapes and correlate community patterns with environmental and spatial variables. Methods: Fifteen streams along riparian forests were selected in three landscapes (mean geographical distance of 285.1 km) inserted in the Paraná and Uruguai river basins. Of the three landscapes, two are inserted in conservation units (State Park of Guartelá and Palmas Wildlife Refuge). Invertebrates were collected in 20 kick net points along 150 m of the streams between June and November 2015. Invertebrates were sorted in the laboratory with three sieves and were identified to the lowest taxonomic level possible. The taxa were classified in functional feeding groups of shredders/detritivores, predators, scrapers, collectors/filters and gatherers/collectors. For each stream, we measured the environmental variables width and velocity, pH, dissolved oxygen, and temperature; and the relative cover of forest, grassland, plantation and silviculture in the catchments. Results: We found a total of 1 058 individuals, divided in 53 morphospecies and 34 families. Lower abundance of benthic macroinvertebrates was found in the northernmost landscape with higher temperature, and forest in the catchment. These streams were described mainly by predator groups, while streams inserted in the other two landscapes showed a more diverse guild composition of shredders/detritivores, gatherers/collectors, collectors/filterers, and scrapers. Geographical distance was the main factor influencing differences in community compositions among landscapes. Conclusions: Lower abundance of the northernmost landscape may be explained by (i) the low habitat heterogeneity due to dominance of sandy substrates, and by (ii) the anthropogenic land use of agriculture and extensive cattle breeding in the region that is ongoing and started before the creation of the conservation unit. Additionally, composition of macroinvertebrates may be correlated with environmental differences among landscapes that, in turn, are related to the geographical distance. Therefore, macroinvertebrate community responses may reflect different biota biogeographical histories that can also be associated with historical land use practices.

Concordance of taxonomic composition patterns across multiple lake assemblages: effects of scale, body size, and land use

1999 ◽  
Vol 56 (11) ◽  
pp. 2029-2040 ◽  
Author(s):  
Andrew P Allen ◽  
Thomas R Whittier ◽  
David P Larsen ◽  
Philip R Kaufmann ◽  
Raymond J O'Connor ◽  
...  
Keyword(s):  
Land Use ◽  
Body Size ◽  
Environmental Gradient ◽  
Environmental Gradients ◽  
Taxonomic Composition ◽  
Forest Composition ◽  
Benthic Macroinvertebrate ◽  
Close Correspondence ◽  
Lake Productivity ◽  
Effects Of Land Use

We assessed environmental gradients and the extent to which they induced concordant patterns of taxonomic composition among benthic macroinvertebrate, riparian bird, sedimentary diatom, fish, and pelagic zooplankton assemblages in 186 northeastern U.S.A. lakes. Human population density showed a close correspondence to this region's dominant environmental gradient. This reflected the constraints imposed by climate and geomorphology on land use and, in turn, the effects of land use on the environment (e.g., increasing lake productivity). For the region as a whole, concordance was highest among assemblages whose taxa were relatively similar in body size. The larger-bodied assemblages (benthos, birds, fish) were correlated most strongly with factors of broader scale (climate, forest composition) than the diatoms and zooplankton (pH, lake depth). Assemblage concordance showed little or no relationship to body size when upland and lowland subregions were examined separately. This was presumably because differences in the scales at which each assemblage integrated the environment were obscured more locally. The larger-bodied assemblages showed stronger associations with land use than the diatoms and zooplankton. This occurred, in part, because they responded more strongly to broad-scale, nonanthropogenic factors that also affected land use. We argue, however, that the larger-bodied assemblages have also been more severely affected by human activities.

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