Effects of anthropogenic impacts on benthic macroinvertebrates assemblages in subtropical mountain streams

Mesa, Leticia Mariana; Reynaga, María Celina; Correa, Marcela del Valle; Sirombra, Martín Gonzalo

doi:10.1590/s0073-47212013000400002

Cited by 10 publications

(5 citation statements)

References 34 publications

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“…This law promotes the protection of forests with native species and the riparian forests. This fact reinforces the necessity to conserve not only the water course but also the riparian forests in order to preserve both aquatic and terrestrial ecosystems (Arzamendia & Giraudo, 2012;Mesa, Reynaga, Correa, & Sirombra, 2013). Moreover, the protection of buffer zones or riparian vegetation was found to be of prime importance as impact-filterers in unprotected areas or in agricultural lands (Diebel, Maxted, Robertson, Han, & Vander Zanden, 2009).…”

Section: Conservation Prioritization Areasmentioning

confidence: 66%

The role of macroinvertebrates for conservation of freshwater systems

Nieto

Ovando

Loyola

et al. 2017

Ecology and Evolution

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Freshwater ecosystems are the most threatened ecosystems worldwide. Argentinianprotected areas have been established mainly to protect vertebrates and plants in terrestrial ecosystems. In order to create a comprehensive biodiverse conservation plan, it is crucial to integrate both aquatic and terrestrial systems and to include macroinvertebrates. Here, we address this topic by proposing priority areas of conservation including invertebrates, aquatic ecosystems, and their connectivity and land uses.Location: Northwest of Argentina. We modeled the ecological niches of different taxa of macroinvertebrates such as Coleoptera, Ephemeroptera, Hemiptera, Megaloptera, Lepidoptera, Odonata, Plecoptera, Trichoptera, Acari, and Mollusca. Based on these models, we analyzed the contribution of currently established protected areas in the conservation of the aquatic biodiversity and we propose a spatial prioritization taking into account possible conflict regarding different land uses. Our analysis units were the real watersheds, to which were added longitudinal connectivity up and down the rivers. A total of 132 species were modeled in the priority area analyses. The analysis 1 showed that only an insignificant percentage of the macroinvertebrates distribution is within the protected areas in the North West of Argentina. The analyses 2 and 3 recovered similar values of protection for the macroinvertebrate species. The upper part of Bermejo, Salí-Dulce, San Francisco, and the Upper part of Juramento basins were identified as priority areas of conservation. The aquatic ecosystems need special protection and 10% or even as much as 17% of land conservation is insufficient for species of macroinvertebrates. In turn the protected areas need to combine the aquatic and terrestrial systems and need to include macroinvertebrates as a key group to sustain the biodiversity. In many cases, the land uses are in conflict with the conservation of biodiversity; however, it is possible to apply the connectivity of the watersheds and create multiple-use modules.

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Section: Conservation Prioritization Areasmentioning

confidence: 66%

The role of macroinvertebrates for conservation of freshwater systems

Nieto

Ovando

Loyola

et al. 2017

Ecology and Evolution

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“…All these taxa occurred in more than half of the studied peatbogs. Importantly, Glossiphonidae was detected in 24 out of 40 sampling points, even if it is usually infrequent in studies conducted in other ecoregions (Mesa et al, 2013). Insects were the dominant item in the composition across the totality of studied communities.…”

Section: Resultsmentioning

confidence: 87%

Modelling beta diversity of aquatic macroinvertebrates in High Andean wetlands

et al. 2017

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Central Andean Highlands represent a singular environment characterized by various extreme conditions. Among them, peatbogs are exceptional marshy habitats scattered throughout this arid and harsh area. In an effort to understand the patterns of beta diversity, we sampled the benthic macroinvertebrates of thirteen peatbogs and related the biological distance with ecological distance using the GDM (Generalized Dissimilarity Modelling) approach. Variables analyzed were altitude, geographical distance, physical and chemical parameters of the water. A coefficient based on the ordering properties of count data, from the perspective of both sites and taxa, was used to measure the compositional similarity between samples. The most frequent taxa were: Hyallela, Simuliidae, Andesiops, Austrelmis, Podonominae, Protallagma, Trichocorixa, Orthocladiinae and Glossiphonidae. The highest altitudinal record ever for leeches is reported here. Altitude and conductivity contributed greatly to the single ecological predictor of beta diversity. Sampling points can be classified first by altitude (cutoff sets at 4200 m), which can be considered a surrogate of a regional factor (distinction between Puna and High Andean ecoregions) and then by conductivity (cutoff sets at 135 µS cm -1 ), which can be considered a proxy of a local factor (distinction between hyperfresh and more mineralized habitats). These results suggest a system of ecological filters acting on them.

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“…However, it is unclear how much humans have an effect on the marine environment, especially the seafloor and related creatures (Halpern cit. Borowski 2001;Mesa et al 2013). The need for regular assessment arises from the fact that shifts in the composition of marine benthic communities portend the disappearance of important services provided by this ecosystem (Tagliapietra and Sigovini 2010;MacDonald et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Macrobenthic infaunal assemblage structure in nearshore and offshore seabeds of Ghana

Commey

Lamptey

Armah

2021

Indo Pac J Ocean Life

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Abstract. Commey NA, Armah AK, Lamptey E. 2021. Macrobenthic infaunal assemblage structure in nearshore and offshore seabeds of Ghana. Indo Pac J Ocean Life 5: 50-60. This research aimed to compare and contrast the sediment properties and benthic macrofaunal assemblage composition of nearshore and offshore habitats. Also, the existing state of benthic macrofaunal assemblages in the Jubilee Fields, Ghana in 2015 is determined. A baseline is established for these communities before constructing a coal-powered plant in the nearshore area of Ekumfi Aboano, Ghana (deep-sea). The research was conducted in the shallower nearshore Ekumfi Aboano (average depth: 15 m) and deeper offshore portions of the Jubilee Fields (average depth: 1,250 m). A Van Veen grab was used to collect sediment samples from the nearshore area, while a box corer was used to collect samples from the deep water. PRIMER was used to look into the distribution of benthic macrofauna. Using GRADISTAT, it was determined that the nearshore sediment (mean grain size of 99.80 m) is fairly sorted with very fine sand. In contrast, offshore sediment (mean grain size of 109.79 m) was poorly sorted and comprised of extremely coarse silty fine sand. It was determined from studies of macrobenthic infauna that there were 11,131 individuals in the nearshore environment, with a density of 38 individuals/m2, and 22,105 individuals in the deep-sea environment, with a density of 47 individuals/m2. Data for the nearshore and offshore environments showed a total of 194 and 983 polychaetes, 827 and 696 crustaceans, 35 and 229 mollusks, 14 and 37 echinoderms, and 43 and 260 "others" (foraminiferans, nematodes, nemerteans, and sipunculids). Crustaceans > polychaetes > molluscs > others > echinoderms dominated the shallow Ekumfi seabed, whereas polychaetes > crustaceans > molluscs > others > echinoderms dominated the offshore Jubilee seabed. There were 116 species discovered close to shore, while 188 were discovered in the deep water. Both locations displayed a high level of diversity (H' > 4; 1-D > 0.9) and were evenly distributed (J' > 0.8). The nearshore was dominated by arthropods (74.30%), while the offshore was dominated by polychaetes (44.58%). A greater variety of macrobenthic infauna was found in the deep sea compared to the nearshore, with a difference of 75% between the two environments.

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Effects of anthropogenic impacts on benthic macroinvertebrates assemblages in subtropical mountain streams

Cited by 10 publications

References 34 publications

The role of macroinvertebrates for conservation of freshwater systems

The role of macroinvertebrates for conservation of freshwater systems

Modelling beta diversity of aquatic macroinvertebrates in High Andean wetlands

Macrobenthic infaunal assemblage structure in nearshore and offshore seabeds of Ghana

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