Spatial and temporal variation patterns of a waterfowl community in a reservoir system of the Central Plateau, Mexico

Severo, Julieta Barragán; López‐López, Eugenia; Stanley, Kathleen Ann Babb

doi:10.1007/978-94-010-0415-2_11

Cited by 7 publications

(5 citation statements)

References 6 publications

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“…Our results have clear and significant management implications to control erosion and reservoir siltation in this Mexican catchment. It is important to highlight that high turbidity levels are observed at a regional scale in lakes and reservoirs of the Mexican central plateau (Severo et al , ; Bravo‐Inclan et al , ; Merino‐Ibarra et al , ). However, none of them attenuates light penetration to such a degree as in Cointzio reservoir, where Secchi disk depths rarely exceed 0.2 m (Susperregui et al , ).…”

Section: Discussionmentioning

confidence: 99%

Tracing sediment sources in a tropical highland catchment of central Mexico by using conventional and alternative fingerprinting methods

Evrard

Poulenard

Némery

et al. 2012

Hydrological Processes

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Land degradation is intense in tropical regions where it causes for instance a decline in soil fertility and reservoir siltation. Two fingerprinting approaches (i.e. the conventional approach based on radionuclide and geochemical concentrations and the alternative diffuse reflectance infrared Fourier transform spectroscopy method) were conducted independently to outline the sources delivering sediment to the river network draining into the Cointzio reservoir, in Mexican tropical highlands. This study was conducted between May and October in 2009 in subcatchments representative of the different environments supplying sediment to the river network. Overall, Cointzio catchment is characterized by very altered soils and the dominance of Andisols and Acrisols. Both fingerprinting methods provided very similar results regarding the origin of sediment in Huertitas subcatchment (dominated by Acrisols) where the bulk of sediment was supplied by gullies. In contrast, in La Cortina subcatchment dominated by Andisols, the bulk of sediment was supplied by cropland. Sediment originating from Potrerillos subcatchment characterized by a mix of Acrisols and Andisols was supplied in variable proportions by both gullies and rangeland/cropland. In this latter subcatchment, results provided by both fingerprinting methods were very variable. Our results outline the need to take the organic carbon content of soils into account and the difficulty to use geochemical properties to fingerprint sediment in very altered volcanic catchments. However, combining our fingerprinting results with sediment export data provided a way of prioritizing the implementation of erosion control measures to mitigate sediment supply to the Cointzio reservoir supplying drinking water to Morelia city. a According to FAO (2006). b Derived from the analysis of aerial photographs. FINGERPRINTING SEDIMENT SOURCES IN MEXICO

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Section: Discussionmentioning

confidence: 99%

Tracing sediment sources in a tropical highland catchment of central Mexico by using conventional and alternative fingerprinting methods

Evrard

Poulenard

Némery

et al. 2012

Hydrological Processes

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“…Second, these ponds are important local conservation areas for freshwater aquatic beetles and bugs, as a result of provision of a permanent habitat that otherwise would be scarce. Although several studies have highlighted the conservation value of reservoirs for other animals (Severo et al, 2002;Hanowski et al, 2006), research on a wider range of taxonomic groups inhabiting reservoirs is needed to determine their role as complementary reserves (Clements et al, 2006;Bilton et al, 2008;Sánchez-Fernández et al, 2008). However, this needs to be set in the context of an already transformed landscape with loss of local wetlands; restoring such wetlands, where possible, should be considered in the future.…”

Section: Conservation Managementmentioning

confidence: 99%

Value of artificial ponds for aquatic beetle and bug conservation in the Cape Floristic Region biodiversity hotspot

Legnouo

Samways

Simaika

2013

Aquatic Conservation

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ABSTRACT1. Freshwater insect species and their host ecosystems are widely threatened. This is particularly so within the agricultural and urban landscapes of Mediterranean-type ecosystems, including those of the Cape Floristic Region (CFR), South Africa. The value of 18 artificial ponds in the CFR was determined for aquatic beetle and bug abundance and species richness, a topic that has been little explored in Africa in general.2. In total, 17 814 aquatic beetle and bug individuals were sampled, from 94 taxa, representing 37 genera and 57 species. Bugs were much more abundant than beetles, representing 82% of all the individuals collected. The beetle and bug fauna showed high levels of endemism, with 36% restricted to the Western Cape Province.3. Five distinct groupings based on species abundances were identified, revealing overall high dissimilarities between groups, ranging from 65% to 82%.4. The associated physico-chemical characteristics of these sites were also investigated. The most important characteristics structuring pond communities were elevation, temperature, pH, pond size and flow regime. For bugs alone, the same variables, except elevation, were important. For beetles, only three variables were found to be most important in explaining community structure: elevation, pH, and flow regime.5. Artificial ponds in the CFR increase the area of occupancy of these insects, and therefore play a major role in conserving them.

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“…Wetlands are important elements of landscapes and provide natural capital and many ecosystem services, such as migratory bird habitat, biodiversity hotspots, water retention, groundwater recharge, flood reduction, and carbon, sediment, and nutrient sequestration (Gale et al, 1993;Drewien et al, 1996;Mitsch & Gosselink, 2000;Rapalee et al, 2001;Bendjoudi et al, 2002;Severo et al, 2002;Leibowitz, 2003). A historic lack of understanding of wetland ecosystems has led to mass destruction of wetlands for economic development.…”

Section: Introductionmentioning

confidence: 98%

Developing and Testing Diatom Indicators for Wetlands in the Casco Bay Watershed, Maine, USA

et al. 2006

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Diatom indicators of wetland condition were developed and tested by assessing human disturbance, water chemistry, and species composition of benthic, epiphytic, and planktonic diatoms from 20 wetlands sampled for 2 years. One sample from each site was randomly selected to form a development data set, while the rest were used as the test data set. Human disturbance indicated substantial differences among wetlands in hydrologic modification, impervious surface, and potential for non-point source contamination. These landscape alterations were related to increases in pH, non-nutrient ions, and nutrients and decreases in dissolved organic carbon and water color. Pre-existing diatom indicators, calculated with autecological information from lakes and aquatic habitats, correlated highly to relevant water chemistry and human disturbance scores. Weighted average models (WAM) of Cl ) , conductivity, pH, and alkalinity derived with the Maine development data set correlated to relevant water chemistry and human disturbance of the test wetlands. Diatom assemblage attributes that correlated with human disturbance were selected to combine into a multimetric index of biotic condition (IBC). IBCs and WAMs from benthic and epiphytic diatoms were usually more precisely related to relevant environmental factors than planktonic diatoms. These results showed that human disturbance alkalized wetlands, enriched them with nutrients, and diatom assemblages responded to these changes. Indicator development protocols for streams can be readily adapted for use in wetlands.

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Spatial and temporal variation patterns of a waterfowl community in a reservoir system of the Central Plateau, Mexico

Cited by 7 publications

References 6 publications

Tracing sediment sources in a tropical highland catchment of central Mexico by using conventional and alternative fingerprinting methods

Tracing sediment sources in a tropical highland catchment of central Mexico by using conventional and alternative fingerprinting methods

Value of artificial ponds for aquatic beetle and bug conservation in the Cape Floristic Region biodiversity hotspot

Developing and Testing Diatom Indicators for Wetlands in the Casco Bay Watershed, Maine, USA

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