Juan David Bogotá-Gregory, Leo Ohyama, Astrid Acosta-Santos, Edwin Agudelo Córdoba, David G. Jenkins
{"title":"安第斯-亚马逊过渡带河流中的鱼类多样性和水质反映了当地土地覆盖而不是上游条件","authors":"Juan David Bogotá-Gregory, Leo Ohyama, Astrid Acosta-Santos, Edwin Agudelo Córdoba, David G. Jenkins","doi":"10.1111/fwb.70084","DOIUrl":null,"url":null,"abstract":"<div>\n \n <p>\n \n </p><ol>\n \n \n <li>Landscapes are heavily influenced by anthropogenic activities, affecting land cover at different scales. Anthropogenic land cover affects downstream aquatic communities in the catchment area via runoff, often reducing diversity. Some landscapes are yet to be strongly influenced, such as where armed conflict has prevented human activities. Land cover in these areas may affect aquatic communities differently and serve as a reference for subsequent changes in land use.</li>\n \n \n <li>We sampled fishes and water temperature, pH, conductivity, and dissolved oxygen at 25 localities from the lightly influenced Andean-Amazonian transition zone in Colombia when armed conflict ended. We used multivariate analysis to infer the effects of land cover on fish and water quality at three local scales (100, 500, and 1000 m radii) relative to upstream catchment land cover. We also evaluated predictors of species richness, effective diversity, and local contribution to β diversity via regressions.</li>\n \n \n <li>Local land cover predicted fish assemblages and water quality in the relatively pristine catchment areas better than upstream catchment land cover. We provided support that local drivers of fish assemblages and water quality become dominated by anthropogenic landscape effects upstream, and the shift may be a sensitive, early indicator of anthropogenic land use on streams. Both water quality and fish assemblages showed highest local correlation with 1000 m buffers over the 100 m and 500 m buffers.</li>\n \n \n <li>Our study represents a baseline for evaluating the effects of anthropogenic activities on relatively conserved streams. The streams from our study system serve as a model for other tropical and subtropical areas at risk of habitat transformation and degradation due to anthropogenic activities.</li>\n </ol>\n \n </div>","PeriodicalId":12365,"journal":{"name":"Freshwater Biology","volume":"70 8","pages":""},"PeriodicalIF":2.7000,"publicationDate":"2025-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Fish Diversity and Water Quality in Streams of the Andean-Amazonian Transition Zone Reflect Local Land Cover Rather Than Upstream Conditions\",\"authors\":\"Juan David Bogotá-Gregory, Leo Ohyama, Astrid Acosta-Santos, Edwin Agudelo Córdoba, David G. Jenkins\",\"doi\":\"10.1111/fwb.70084\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div>\\n \\n <p>\\n \\n </p><ol>\\n \\n \\n <li>Landscapes are heavily influenced by anthropogenic activities, affecting land cover at different scales. Anthropogenic land cover affects downstream aquatic communities in the catchment area via runoff, often reducing diversity. Some landscapes are yet to be strongly influenced, such as where armed conflict has prevented human activities. Land cover in these areas may affect aquatic communities differently and serve as a reference for subsequent changes in land use.</li>\\n \\n \\n <li>We sampled fishes and water temperature, pH, conductivity, and dissolved oxygen at 25 localities from the lightly influenced Andean-Amazonian transition zone in Colombia when armed conflict ended. We used multivariate analysis to infer the effects of land cover on fish and water quality at three local scales (100, 500, and 1000 m radii) relative to upstream catchment land cover. We also evaluated predictors of species richness, effective diversity, and local contribution to β diversity via regressions.</li>\\n \\n \\n <li>Local land cover predicted fish assemblages and water quality in the relatively pristine catchment areas better than upstream catchment land cover. We provided support that local drivers of fish assemblages and water quality become dominated by anthropogenic landscape effects upstream, and the shift may be a sensitive, early indicator of anthropogenic land use on streams. Both water quality and fish assemblages showed highest local correlation with 1000 m buffers over the 100 m and 500 m buffers.</li>\\n \\n \\n <li>Our study represents a baseline for evaluating the effects of anthropogenic activities on relatively conserved streams. 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Fish Diversity and Water Quality in Streams of the Andean-Amazonian Transition Zone Reflect Local Land Cover Rather Than Upstream Conditions
Landscapes are heavily influenced by anthropogenic activities, affecting land cover at different scales. Anthropogenic land cover affects downstream aquatic communities in the catchment area via runoff, often reducing diversity. Some landscapes are yet to be strongly influenced, such as where armed conflict has prevented human activities. Land cover in these areas may affect aquatic communities differently and serve as a reference for subsequent changes in land use.
We sampled fishes and water temperature, pH, conductivity, and dissolved oxygen at 25 localities from the lightly influenced Andean-Amazonian transition zone in Colombia when armed conflict ended. We used multivariate analysis to infer the effects of land cover on fish and water quality at three local scales (100, 500, and 1000 m radii) relative to upstream catchment land cover. We also evaluated predictors of species richness, effective diversity, and local contribution to β diversity via regressions.
Local land cover predicted fish assemblages and water quality in the relatively pristine catchment areas better than upstream catchment land cover. We provided support that local drivers of fish assemblages and water quality become dominated by anthropogenic landscape effects upstream, and the shift may be a sensitive, early indicator of anthropogenic land use on streams. Both water quality and fish assemblages showed highest local correlation with 1000 m buffers over the 100 m and 500 m buffers.
Our study represents a baseline for evaluating the effects of anthropogenic activities on relatively conserved streams. The streams from our study system serve as a model for other tropical and subtropical areas at risk of habitat transformation and degradation due to anthropogenic activities.
期刊介绍:
Freshwater Biology publishes papers on all aspects of the ecology of inland waters, including rivers and lakes, ground waters, flood plains and other freshwater wetlands. We include studies of micro-organisms, algae, macrophytes, invertebrates, fish and other vertebrates, as well as those concerning whole systems and related physical and chemical aspects of the environment, provided that they have clear biological relevance.
Studies may focus at any level in the ecological hierarchy from physiological ecology and animal behaviour, through population dynamics and evolutionary genetics, to community interactions, biogeography and ecosystem functioning. They may also be at any scale: from microhabitat to landscape, and continental to global. Preference is given to research, whether meta-analytical, experimental, theoretical or descriptive, highlighting causal (ecological) mechanisms from which clearly stated hypotheses are derived. Manuscripts with an experimental or conceptual flavour are particularly welcome, as are those or which integrate laboratory and field work, and studies from less well researched areas of the world. Priority is given to submissions that are likely to interest a wide range of readers.
We encourage submission of papers well grounded in ecological theory that deal with issues related to the conservation and management of inland waters. Papers interpreting fundamental research in a way that makes clear its applied, strategic or socio-economic relevance are also welcome.
Review articles (FRESHWATER BIOLOGY REVIEWS) and discussion papers (OPINION) are also invited: these enable authors to publish high-quality material outside the constraints of standard research papers.