Effects of agricultural pond eutrophication on survival and health status of Scinax nasicus tadpoles

Peltzer, Paola M.; Lajmanovich, Rafael Carlos; Sánchez-Hernández, Juan C.; Cabagna, Mariana; Attademo, Andrés M.; Bassó, Agustín

doi:10.1016/j.ecoenv.2007.06.005

Cited by 96 publications

(53 citation statements)

References 65 publications

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“…The loss of forest cover due to fire can also result in soil erosion which will result in increased sedimentation of streams. In addition, eutrophication may occur and negatively affect water quality, further affecting amphibians that breed in those waters (Green et al 2004;Peltzer et al 2006). These various effects may interact synergistically and greatly elevate the damaging impacts on amphibian and reptile populations.…”

Section: Synergistic Vulnerabilitiesmentioning

confidence: 99%

Impacts of climate change on the amphibians and reptiles of Southeast Asia

et al. 2010

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Amphibians and reptiles will be adversely affected by projected rapid changes in climate in the next decades. Here, we review the known and potential impacts of climate change on the Southeast Asian amphibians and reptiles and make mitigation recommendations for both research and policy. Current amphibian and reptile distributions and ecologies mirror climate patterns, and we expect that adaptation to changes in these parameters will be too slow relative to their rate of expected change, and that pervasive changes will occur to species assemblages, communities, and ecosystem functioning and services. Southest Asia is a network of islands with relatively few mountains, effectively preventing most herpetofauna from migrating away from the effects of climate change. Reflecting specific known and hypothesized physiological and ecological thresholds, we estimate that in \50 years, amphibians and reptiles in Southeast Asia will have reached or exceeded most limits in their abilities to adapt to the effects of climate change and that temperature dependent sex determination, higher metabolic rates, and less bio-available water will have severe and irreversible effects on these organisms. We suggest that human decision-making and policy development have already lagged and that societal change is happening too slowly for effective mitigation. If we are to avert devastating loss of biodiversity and a complete meltdown of ecosystem services, we must quickly change our attitudes and thinking about how we interact with and use biological systems.

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Section: Synergistic Vulnerabilitiesmentioning

confidence: 99%

Impacts of climate change on the amphibians and reptiles of Southeast Asia

et al. 2010

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“…Furthermore, fish from this family usually inhabit rivers surrounded by agricultural and polluted areas, as in Parana River (Guidelli et al 2011). This basin receives high amount of washed-off nutrients and pesticides (Peltzer et al 2008). These features may increase the susceptibility of fish to pathogens that will be reflected in the histological evaluation of the fish.…”

Section: Introductionmentioning

confidence: 99%

A histology-based study in apparently healthy wild freshwater stingrays Potamotrygon motoro

et al. 2015

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Histopathological studies are important as a reference in pathological process. There are a few of these studies in elasmobranchs. The aim of this study was to describe the histology of kidney, spleen, liver, and gills of wild apparently healthy Potamotrygon motoro. However, we observed some pathological findings in these animals. Nineteen P. motoro were collected from the Parana River, Brazil. Histology of kidney, spleen, liver, and gills were performed according to usual procedures. Briefly, the organs were immersed in 10 % formaldehyde solution for 48 h and routinely processed, embedded in paraffin (5-6 mm thick), and subsequent staining with hematoxylin-eosin (HE), Perls', and Schmorl's stains. Histological surface areas were measured using Image Pro Plus software 6.3. We observed that melanomacrophages around the portal vein were larger and more abundant than in the area without the bile duct. Moderate steatosis was observed in most fish, large amount of melanomacrophages and lymphocytes in the gills, liver, and spleen comparing with other studies in this species that could suggest that the immune system in these animals is constantly active. No clinical signs were observed in the fish. Studies are necessary to characterize the immune response against pathogens in elasmobranchs, especially in the Potamotrygon species.

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“…Agriculture and livestock practice is the main commercial activity in the region (Pengue 2005;Rossi 2006), and therefore considered one of the main causes of deterioration and loss of natural habitat. In this context, some studies have indicated that agroecosystems could represent inhospitable habitats for anuran populations (Carey and Bryant 1995;Taylor et al 2005;Peltzer et al 2008;Bionda et al 2013a, b;Babini et al 2015) particularly those with intensive practice characteristic of soybean crops in the central region of Argentina. Among the environmental variables analyzed for this study, values for conductivity, salinity, and dissolved solids were higher for VD and AG sites than other sites.…”

Section: Discussionmentioning

confidence: 98%

“…The responses of populations (e.g., longevity and natality) and communities (e.g., diversity and richness) are an alternative and a complement in the evaluation of environmental quality . In this sense, in addition to measurements of environmental variables, studies on population parameters such as recruitment, biomarkers, feeding ecology (Cabagna et al 2005;Peltzer et al 2008;Pollo et al 2012;Bionda et al 2013a, b), species richness, and diversity (Peltzer et al 2006;Bionda et al 2011b) are used as indicators of environmental health.…”

Section: Introductionmentioning

confidence: 99%

Common toad Rhinella arenarum (Hensel, 1867) and its importance in assessing environmental health: test of micronuclei and nuclear abnormalities in erythrocytes

Pollo

Bionda

Salinas

et al. 2015

Environ Monit Assess

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Anthropogenic activities may generate significant changes in the integrity of aquatic ecosystems, so long-term monitoring of populations that inhabit them is crucial. Counting micronucleated erythrocytes (MN) and erythrocytic nuclear abnormalities (ENA) in peripheral blood is a widely used method for detecting chromosomal damage due to chemical agents in the water. We analyzed MN and ENA frequency in blood obtained from the common toad Rhinella arenarum populations in sites with different degrees of environmental degradation. The results of this study indicate that there is an association between the frequency of micronuclei and nuclear abnormalities and the degree of environmental alteration recorded for the sites studied.

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Effects of agricultural pond eutrophication on survival and health status of Scinax nasicus tadpoles

Cited by 96 publications

References 65 publications

Impacts of climate change on the amphibians and reptiles of Southeast Asia

Impacts of climate change on the amphibians and reptiles of Southeast Asia

A histology-based study in apparently healthy wild freshwater stingrays Potamotrygon motoro

Common toad Rhinella arenarum (Hensel, 1867) and its importance in assessing environmental health: test of micronuclei and nuclear abnormalities in erythrocytes

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