Effects of forest disturbances on aquatic insect assemblages

Yoshimura, Mayumi

doi:10.1111/j.1479-8298.2011.00511.x

Cited by 37 publications

(33 citation statements)

References 78 publications

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“…These changes may alter the balance of nutrients, sediments, debris, and substrates, which is essential to the trophic structure of a community (Allan, 2004;Yoshimura, 2012). In particular, a reduction in riparian forest cover, generally results in a decrease in the abundance of shredders -due to a decline in the supply of dead leaves and an increase in sunlight penetration -while the abundance of scrapers expands (Brasil et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

The effects of environmental integrity on the diversity of mayflies, Leptophlebiidae (Ephemeroptera), in tropical streams of the Brazilian Cerrado

Brasil¹,

Juen²,

Cabette³

2014

Ann. Limnol. - Int. J. Lim.

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-Aquatic insects are widely distributed, and are especially diverse and abundant in tropical streams, where they play an important role in the food chain due to their diversity of feeding strategies, and the potential for the transfer of energy between aquatic and terrestrial environments. The intimate relationship found between these insects and environmental variables means that they are often used as bioindicatorss in environmental studies. We tested the hypothesis that the loss of environmental integrity in tropical streams will lead to a loss of species and a decline in the abundance of mayflies (Leptophlebiidae), in addition to a change in species composition, and the dynamics of population. Collect immature leptophlebiids in 18 streams representing different degrees of conservation, in the Brazilian Cerrado. The environmental integrity of the sites was assessed using a Habitat Integrity Index (HII), which generates values of zero (degraded) to one (preserved), based on soil use, the extension and conservation of riparian forest, as well as morphological features of the stream. A total of 4945 immature leptophlebiids were collected and identified as belonging to 16 species or morphospecies. On an average, a reduction of 0.1 in the value of the HII led to the loss of five specimens and one species. The composition of the communities varied systematically along the environmental gradient, with more sensitive species being found only when the index was above a threshold of 0.6. The importance of the riparian vegetation for the aquatic biota, especially its role in the mitigation of impacts from the surrounding matrix, supports the universal conservation of this type of habitat.

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Section: Introductionmentioning

confidence: 99%

The effects of environmental integrity on the diversity of mayflies, Leptophlebiidae (Ephemeroptera), in tropical streams of the Brazilian Cerrado

Brasil¹,

Juen²,

Cabette³

2014

Ann. Limnol. - Int. J. Lim.

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“…Las actividades de tipo agrícola y minero alteran negativamente los ecosistemas acuáticos, las cuales generan cambios estructurales (en la vegetación ribereña), físicos y químicos de los ecosistemas, y por consiguiente una disminución de la diversidad de insectos acuáticos (Allan, 2004;Harvey et al, 2008;Yoshimura, 2012;Chará-Serna et al, 2015). Por lo tanto, se predice que la riqueza, abundancia y composición de la comunidad de insectos se verán alteradas por la actividad minera, debido al uso de metales pesados (mercurio y cianuro) usados para la extracción de oro y el tiempo de exposición de los organismos a estas sustancias.…”

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Diversidad de insectos acuáticos en quebradas impactadas por agricultura y minería, Caldas, Colombia

Villada‐Bedoya

Bautista

Dias

et al. 2017

RBT

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Diversidad de insectos acuáticos en quebradas impactadaspor agricultura y minería, Caldas, Colombia Abstract: Insect diversity in streams impacted by agriculture and mining, Caldas, Colombia. Freshwater ecosystems are under severe anthropic pressure (e.g. agriculture and mining), which generates adverse effects on the diversity of aquatic insects. We evaluated the insect community in streams impacted by agriculture and mining, and determined how these activities affected the community. We studied six streams in Caldas (Colombia), two with mining and two with agriculture impact. We collected the insects using a Surber net with three replicates per substrate (fine sediment, stones, and litter). In total, 12 502 aquatic insects were collected. The most representative genera were Baetodes, Simulium, and Cricotopus (57.7 %). Streams with agricultural activity had lower aquatic insects diversity than mining impact (F 2,309 = 21.82, p = 0.001). The agriculture areas presented a structure dominated by Simulium and Cricotopus (Diptera, pollution-tolerant morphospecies).Baetodes dominated in stones substrate, Cricotopus in sediment, and Simulium and Cricotopus dominated in litter (F 2,309 = 2.84, p = 0.001). Therefore, both factors (impact and substrate type) are being important in determining the diversity of aquatic insects. Our results suggested that agricultural activity has a higher impact on the diversity of aquatic insects, which may be associated with the loss of riparian vegetation. Rev. Biol. Trop. 65 (4): 1635-1659. Epub 2017 December 01.

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“…La descomposición de hojarasca es un proceso complejo que depende de factores bióticos y abióticos, tales como las características propias de la hojarasca, las condiciones fisicoquí-micas del cuerpo de agua y los organismos que la colonizan y consumen (Graça, 2001;Leroy & Marks, 2006;Pérez, Menéndez, Larrañaga & Pozo, 2011;Yoshimura, 2012). Factores a distinta escala (p.ej.…”

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Descomposición de hojarasca en seis arroyos de Bosque Mesófilo de Montaña en la cuenca alta del río La Antigua, Veracruz, México

Astudillo

Ramírez

Novelo-Gutiérrez

et al. 2014

RBT

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Descomposición de hojarasca en seis arroyos de Bosque Mesófilo deMontaña en la cuenca alta del río La Antigua, Veracruz, México We assessed relations between leaf decomposition rates (k), stream physicochemistry, and macroinvertebrates colonizing leaf packs. Physicochemical parameters showed a clear seasonal difference at all study streams. Leaves were colonized by collector-gatherer insects, followed by shredders. Assessment of factors related to k indicated that only forest cover was negatively related to leaf decomposition rates. Thus stream physicochemistry and seasonality had no impact on decomposition rates. We concluded that leaf litter decomposition at our study streams is a stable process over the year. However, it is possible that this stability is the result of factors regulating decomposition during the different seasons and streams. Rev. Biol. Trop. 62 (Suppl. 2): 111-127. Epub 2014 April 01.

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Effects of forest disturbances on aquatic insect assemblages

Cited by 37 publications

References 78 publications

The effects of environmental integrity on the diversity of mayflies, Leptophlebiidae (Ephemeroptera), in tropical streams of the Brazilian Cerrado

The effects of environmental integrity on the diversity of mayflies, Leptophlebiidae (Ephemeroptera), in tropical streams of the Brazilian Cerrado

Diversidad de insectos acuáticos en quebradas impactadas por agricultura y minería, Caldas, Colombia

Descomposición de hojarasca en seis arroyos de Bosque Mesófilo de Montaña en la cuenca alta del río La Antigua, Veracruz, México

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