Aquatic insect diversity in streams across a rural–urban land-use discontinuum

Lundquist, Matthew J.; Zhu, Weixing

doi:10.1007/s10750-019-3955-2

Cited by 15 publications

(12 citation statements)

References 59 publications

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“…We expected that other human impacts from urbanization, such as source pollution interferes with, and, in some cases, completely disrupts, stream-riparian buffer interactions, thereby limiting their potentially positive effects on fish populations. Urban land uses have been shown in several studies to be detrimental to fish populations [21][22][23]54,55] as well as other aquatic biota [16,17,[56][57][58]. Given the presence of point-source and diffuse pollution in our urban streams with measured impacts on indicators of stream health [29], it is highly likely that water quality is a major limiting factor for populations of fish species, like brown trout.…”

Section: Effects Of Forest Buffers On Stream Fish In An Urban Contextmentioning

confidence: 99%

Forested Riparian Zones Provide Important Habitat for Fish in Urban Streams

Kupilas

Burdon

Thaulow

et al. 2021

Water

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Riparian zones form a boundary between aquatic and terrestrial ecosystems, with disproportionate influences on food web dynamics and ecosystem functioning in both habitats. However, riparian boundaries are frequently degraded by human activities, including urbanization, leading to direct impacts on terrestrial communities and indirect changes that are mediated through altered connectivity with adjacent aquatic ecosystems. We investigated how riparian habitat influences fish communities in an urban context. We electrofished nine urban site pairs with and without forested riparian buffers, alongside an additional 12 sites that were located throughout the river networks in the Oslo Fjord basin, Norway. Brown trout (Salmo trutta) were the dominant fish species. Riparian buffers had weak positive effects on fish densities at low to moderate levels of catchment urbanization, whereas fish were absent from highly polluted streams. Subtle shifts in fish size distributions suggested that riparian buffers play an important role in metapopulation dynamics. Stable isotopes in fish from buffered reaches indicated dietary shifts, pointing to the potential for a greater reliance on terrestrial-sourced carbon. Combining these results, we postulate that spatially-mediated ontogenetic diet shifts may be important for the persistence of brown trout in urban streams. Our results show that using a food web perspective is essential in understanding how riparian buffers can offset impacts in urban catchments.

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Section: Effects Of Forest Buffers On Stream Fish In An Urban Contextmentioning

confidence: 99%

Forested Riparian Zones Provide Important Habitat for Fish in Urban Streams

Kupilas

Burdon

Thaulow

et al. 2021

Water

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“…Tropical freshwaters are among the most threatened ecosystems, experiencing biodiversity loss at alarming rates (Sundar et al 2020). In addition, landscape alterations including deforestation, urbanization, and water withdrawal have been the main threats to lotic habitats (Santos and Stevenson 2011;do Amaral et al 2015;Lundquist and Zhu 2019).…”

Section: Implication Of the Study For Conservationmentioning

confidence: 99%

Aquatic insect communities in headwater streams of Ciliwung River watershed, West Java, Indonesia

et al. 2020

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Abstract. Wakhid, Rauf A, Krisanti M, Sumertajaya IM, Maryana N. 2021. Aquatic insect communities in headwater streams of Ciliwung River watershed, West Java, Indonesia. Biodiversitas 22: 30-41. Ciliwung is one of the major rivers flowing from Cisarua (Bogor) to Jakarta. This study was conducted to assess and compare aquatic insect biodiversity and community structure in various headwater streams with respect to different land-use types. Ten stream reaches of the first and second orders representing three different land-use types in the surrounding area (forest, tea plantation, village) were selected. At each stream reach, the aquatic insects were collected using a D-net (0.4 mm mesh). Physico-chemical properties of water were directly measured in the field. Samples were collected every two months from April until December 2018. A total of 26531 aquatic insect specimens belonging to 75 species/morphospecies, 46 families, and 10 orders were recorded. The order Trichoptera was the most abundant comprising 51.28% of the total collected insects, followed by Diptera (30.5%), Ephemeroptera (7.52%), and Plecoptera (6.25%). The highest proportion of functional feeding group was filtering-collectors (61.34%), followed by shredders (16.29%), gathering-collectors (15.32%), and predators (6.94%). Abundance of Diptera and Plecoptera was significantly higher in forest streams, while Ephemeroptera in plantation streams, and Trichoptera in village streams. The peak population of Diptera, Ephemeroptera, and Trichoptera occurred in June (dry period), while Plecoptera in December (wet period). The forest streams exhibited the highest species richness and diversity. Analysis of similarity (ANOSIM) showed a low dissimilarity among streams of the three land uses (Global R=0.217; P<0.001). The non-metric multidimensional scaling (NMDS) analysis showed that forest streams somewhat separated from plantation and village streams. The study provided important information on aquatic insect biodiversity, and indicated the need for forest area preservation in the headwater streams of Ciliwung River watershed.

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“…Any spatial change in the invertebrate composition of running waters reflects the physical and chemical effects induced by dam impoundments and bed regulation. Regulated, dammed, and polluted streams or ditches are characterized by smaller numbers and lower diversity indexes of macroinvertebrate taxa compared to forest streams [2,8,9]. On the other hand, zooplankton almost always respond positively to dam impoundments and new conditions that This study was performed in the Bukówka stream (and drainage of the lower stretch of the Oder river, NW Poland) ( Figure 1).…”

Section: Introductionmentioning

confidence: 99%

Spatial Changes in Invertebrate Structures as a Factor of Strong Human Activity in the Bed and Catchment Area of a Small Urban Stream

Czerniawski

Sługocki

Krepski

et al. 2020

Water

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The threats to small urban streams lead to a decrease in their water quality and dysregulate their ecological balance, thereby affecting the biodiversity and causing degradation of indicators that determine the ecological potential. The aim of our study was to determine the impact of abiotic conditions induced by intensive human activity on the community structures of invertebrates (zooplankton and macroinvertebrates) in the small urban stream Bukówka in the Szczecin agglomeration (NW Poland). This stream exhibits the same characteristics as a large river, in which the mass of live organic matter increases with their length. The composition of invertebrates (zooplankton and macroinvertebrates) was strongly influenced by the changes caused by humans in the stream bed. The construction of small reservoirs and bed regulation in this small urban streams had a similar effect on the quality of the water and ecological potential as in large rivers, but at a lower scale.

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Aquatic insect diversity in streams across a rural–urban land-use discontinuum

Cited by 15 publications

References 59 publications

Forested Riparian Zones Provide Important Habitat for Fish in Urban Streams

Forested Riparian Zones Provide Important Habitat for Fish in Urban Streams

Aquatic insect communities in headwater streams of Ciliwung River watershed, West Java, Indonesia

Spatial Changes in Invertebrate Structures as a Factor of Strong Human Activity in the Bed and Catchment Area of a Small Urban Stream

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