Agricultural ponds as alternative habitat for waterbirds: spatial and temporal patterns of abundance and management strategies

Sebastián‐González, Esther; Sánchez‐Zapata, José A.; Botella, Francisco

doi:10.1007/s10344-009-0288-x

Cited by 102 publications

(87 citation statements)

References 37 publications

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“…Such a result could follow simply from overall variation in habitat quality, the birds aggregating at the highest quality ponds. However, our results are based on a model that accounts for all environmental and spatial covariates that we expected to be of major importance (Cramp 1998;Sánchez-Zapata et al 2005;Abellán et al 2006;Arocena 2007;Sebastián-González et al 2010a). Further, the within-year aggregation pattern was evident also in model M2(R), which uses information on the species presence in the previous year, and thus includes an accurate assessment of habitat quality from the species point of view.…”

Section: Discussionmentioning

confidence: 99%

“…We characterized the ponds using seven environmental variables that were known to affect the occurrence of this species community (Sánchez-Zapata et al 2005;Sebastián-González et al 2010a). As covariates, we used (i) the log-transformed pond area (A), (ii) the log-transformed distance to closest wetland (D), and (iii) the log-transformed connectivity to other ponds (S).…”

Section: (C) Pond Characteristicsmentioning

confidence: 99%

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Testing the heterospecific attraction hypothesis with time-series data on species co-occurrence

et al. 2010

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The distributional patterns of actively moving animals are influenced by the cues that the individuals use for choosing sites into which they settle. Individuals may gather information about habitat quality using two types of strategies, either directly assessing the relevant environmental factors, or using the presence of conspecifics or heterospecifics as an indirect measure of habitat quality. We examined patterns of heterospecific attraction with observational time-series data on a community of seven waterbird species breeding in artificial irrigation ponds. We fitted to the data a multivariate logistic regression model, which attributes the presence -absence of each species to a set of environmental and spatial covariates, to the presence of con-and heterospecifics in the previous year and to the presence of heterospecifics in the same year. All species showed a clear tendency to continue breeding in the same sites where they were observed in the previous year. Additionally, the presence of heterospecifics, both in the previous year and in the same year, generally increased the probability that the focal species was found breeding on a given pond. Our data thus give support for the heterospecific attraction hypothesis, though causal inference should be confirmed with manipulative experiments.

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Section: Discussionmentioning

confidence: 99%

Section: (C) Pond Characteristicsmentioning

confidence: 99%

Testing the heterospecific attraction hypothesis with time-series data on species co-occurrence

et al. 2010

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“…Específi camente, se registró un máximo en la abundancia de pato jergón grande (A. geórgica) entre octubre y noviembre. Se ha documentado recientemente que esta conectividad entre humedales artifi ciales puede tener diversas consecuencias en las comunidades reproductivas (Sebastián-González et al 2010;Ma et al 2010). En términos de la composición de la comunidad de aves, se observó por medio de otro análisis exploratorio (similitud de Jaccard) diferencias entre otoño y el resto de las estaciones.…”

Section: Estacionalidadunclassified

“…Esta diferencia se generó dada la baja riqueza ornitológica y la alta variación mensual de la composición de especies, características que podrían estar relacionadas con el carácter transitorio que posee esta estación entre el periodo seco y lluvioso, y no se asociaría en este caso con un infl ujo de aves migratorias como se ha documentado para humedales costeros (Simeone et al 2008). Parámetros tales como la riqueza y la diversidad no presentaron variación en ninguno de los dos ambientes, lo que coincide con otros estudios en agroambientes de España (Sebastián-González et al 2010).…”

Section: Estacionalidadunclassified

“…Esto podría deberse a que esta especie junto con otros anseriformes poseen una ocupación del ambiente opcional frente a otros sitios de similares características, asociándose su presencia positivamente al tamaño del humedal (Sebastián-González et al 2010) y prefi riendo tranques con niveles estables de agua (Gordon et al 1998). Además, otras investigaciones sugieren que los humedales con niveles constantes de agua son más convenientes para la reproducción de Gruiformes y Anseriformes (Krapu 1970;Laperle 1974).…”

Section: Poblacionesunclassified

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Cambios temporales en la abundancia y composición del ensamble de aves acuáticas en tranques artificiales en Chile central

Peña-Villalobos¹,

Fibla²,

Salazar³

et al. 2012

Gayana (Concepc.)

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Cambios temporales en la abundancia y composición del ensamble de aves acuáticas en tranques artifi ciales en Chile central RESUMENLa zona central de Chile se caracteriza por ser un ambiente de tipo mediterráneo con marcada estacionalidad climática. En esta zona de gran actividad agrícola existen tranques artifi ciales destinados al regadío, los cuales pueden generar ambientes que constituyen hábitats alternativos para el desarrollo y nidifi cación de aves acuáticas. A pesar de la existencia de datos censales en este tipo de tranques, no se han realizado trabajos que aborden la estacionalidad climática como un factor implicado en la variación temporal de la abundancia y del ensamble ornitológico. En este trabajo, se estudiaron los cambios temporales de las comunidades de aves en dos tipos de tranques en la Región Metropolitana (33° 29' S -70º 54´ W): un tranque de tipo estacional con régimen pluvial, que se seca durante la época estival y otro que se alimenta en forma controlada de aguas servidas. Sólo en el ambiente de régimen pluvial se observó variación estacional de la abundancia, la que se correlacionó positivamente con el índice de aridez mensual de Martonne. Por otra parte, en el ambiente de régimen controlado se registró sólo una tendencia en el aumento de la abundancia en el periodo estival, sin un incremento signifi cativo. Además, se observaron en los dos tipos de tranques cambios estacionales en la composición de los ensambles, variación numérica de ciertas poblaciones y dispersión de aves entre tranques cercanos por efectos de desecación estival. Finalmente, se discute la importancia de los tranques de régimen controlado (e.g. plantas de tratamiento o tranques de aguas servidas) como hábitats estivales opcionales durante el proceso de desecación de sitios estacionales. PALABRAS CLAVE:Aves acuáticas, estacionalidad, índice de aridez de Martonne, humedales, tranques. ABSTRACTCentral Chile is characterized by a Mediterranean type environment with a strong climatic seasonality. In this zone of high agricultural activity there are artifi cial ponds intended for irrigation which can generate environments that constitute alternative habitats for development and nesting of waterbirds. Despite the existence of census data in these types of ponds, there are no studies addressing climatic seasonality as a factor which could infl uence temporal variability and abundance of the ornithological population. With this purpose, we studied temporal changes of the bird community in two types of ponds in the metropolitan region (33° 29' S -70º 54´ W): a seasonal-type pond with pluvial regime that dries during summer season, and a managed pond, with permanent wastewater fl ow. In the pond with pluvial regime we observed a seasonal variation in the abundance of birds, which correlates positively with the Martonne's aridity index. On the other hand, the abundance remained relatively constant in the controlled environment, registering a non signifi cant increase of the abundance during the summer season. Moreover, we observ...

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Seasonal differences in drivers of species richness of waders in inland wetlands of La Mancha Húmeda Biosphere Reserve

Gonçalves

Gil‐Delgado

Gosálvez

et al. 2018

Aquatic Conservation

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Temporary inland wetlands are among the most threatened ecosystems worldwide, and recognition of the factors that determine species richness in different seasons is key for developing conservation plans for these systems. La Mancha Húmeda Biosphere Reserve in central Spain has many inland wetlands of this type, but the driving ecological processes of species richness are poorly understood. This study examines the association of landscape and local variables with species richness patterns of inland wetlands of La Mancha Húmeda Biosphere Reserve during winter and the breeding season. The number of lakes in several increasing radii was a proxy of connectivity, and maximum flooded surface and shoreline length were surrogates of the species–area relationship. Other landscape and local habitat variables, such as hydroperiod (length of inundation period), distance from human settlements, shoreline development index, vegetation surface cover, average lake depth, number of islands and surface area of islands were also analysed. Hierarchical partitioning analysis was used to evaluate the contribution of the environmental variables to explain the species richness of waders. Species richness (26 species, four threatened in Europe) had different associations with the variables during the wintering and breeding seasons. The richness of breeding and wintering species was positively associated with hydroperiod and maximum flooded surface area respectively. No variable measured was negatively associated with species richness in any season. Hydroperiod and flooded surface area are altered directly by human activities. Water extraction for irrigation reduces hydroperiod in some wetlands, whereas wastewater input extends hydroperiod in others, promoting wader concentrations in lakes flooded in summer and potentially favouring botulism outbreaks. In addition, the lack of protection and management on most of the lakes in La Mancha Húmeda Biosphere Reserve also favours encroachment of agriculture, destroying and degrading habitat for wintering and breeding waders.

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Agricultural ponds as alternative habitat for waterbirds: spatial and temporal patterns of abundance and management strategies

Cited by 102 publications

References 37 publications

Testing the heterospecific attraction hypothesis with time-series data on species co-occurrence

Testing the heterospecific attraction hypothesis with time-series data on species co-occurrence

Cambios temporales en la abundancia y composición del ensamble de aves acuáticas en tranques artificiales en Chile central

Seasonal differences in drivers of species richness of waders in inland wetlands of La Mancha Húmeda Biosphere Reserve

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