Zooplankton communities across a hydroperiod gradient of temporary ponds in the Doñana National Park (SW Spain)

Serrano, Laura; Fahd, Khalid

doi:10.1672/0277-5212(2005)025[0101:zcaahg]2.0.co;2

Cited by 76 publications

(69 citation statements)

References 40 publications

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“…Apart from the Guadalquivier river marshes, it preserves a large network of small temporary ponds [25,26]. These temporary ponds are a critical habitat for many species of aquatic flora and fauna: macrophytes [27], invertebrates [28][29][30], and amphibians [10,31,32]. Although Doñana temporary ponds are mainly fed by rainfall, its hydrology is also directly dependent on groundwater.…”

Section: Introductionmentioning

confidence: 99%

Evidence of Hydroperiod Shortening in a Preserved System of Temporary Ponds

2010

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Based on field data simultaneous with Landsat overpasses from six different dates, we developed a robust linear model to predict subpixel fractions of water cover. The model was applied to a time series of 174 Landsat TM and ETM+ images to reconstruct the flooding regime of a system of small temporary ponds and to study their spatio-temporal changes in a 23-year period. We tried to differentiate natural fluctuations from trends in hydrologic variables (i.e., hydroperiod shortening) that may threaten the preservation of the system. Although medium-resolution remote sensing data have rarely been applied to the monitoring of small-sized wetlands, this study evidences its utility to understand the hydrology of temporary ponds at a local scale. We show that the temporary ponds in Doñana National Park constitute a large and heterogeneous system with high intra and inter-annual variability. We also evidence that the conservation value of this ecosystem is threatened by the observed tendency to shorter annual hydroperiods in recent years, probably due to aquifer exploitation. This system of temporary ponds deserves special attention for the high density and heterogeneity of natural ponds, not common in Europe. For this reason, management decisions to avoid its destruction or degradation are critical.

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Section: Introductionmentioning

confidence: 99%

Evidence of Hydroperiod Shortening in a Preserved System of Temporary Ponds

2010

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“…relative abundance), which is usually preferred in diversity assessments (Magurran, 2004 (European Commission, 2007), with a spatial configuration conferring robustness to inter-annual variability in hydrological conditions (Fortuna et al, 2006). These ponds are a critical habitat of many species of aquatic flora and fauna: macrophytes (Garcı´a Murillo et al, 2006), invertebrates (Bigot and Marazanof, 1966;Milla´n et al, 2005;Serrano and Fahd, 2005), and amphibians (Dı´az-Paniagua, 1990;Dı´az-Paniagua et al, 2005). The area has been designated as a location of 'special interest for the conservation' of amphibians (Santos et al, 1996).…”

Section: Introductionmentioning

confidence: 99%

Inter‐annual variability in amphibian assemblages: implications for diversity assessment and conservation

Gómez‐Rodríguez

Díaz‐Paniagua

Bustamante

et al. 2010

Aquatic Conservation

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ABSTRACT1. Diversity assessments and conservation management should take into account the dynamic nature of populations and communities, particularly when they are subject to highly variable and unpredictable environmental conditions.2. This study evaluates the inter-annual variability in the assemblage composition (temporal turnover) of an amphibian community breeding in a highly dynamic habitat, a Mediterranean temporary pond system, during a 4-year period.3. A comprehensive framework is provided to evaluate temporal turnover from data of a differing nature (species richness, presence/absence and relative abundance) and, especially, to discern variation in richness (species loss) from changes in the identity or abundance of species (species replacement).4. Results show that the pond amphibian assemblages in Don˜ana National Park exhibited high inter-annual variability during the study period, both in the number of species, species identity and their relative abundance. This result provides evidence for the inadequacy of surveys conducted only in one breeding season to characterize the species assemblage associated with a given pond. Besides, it suggests that a given pond offers different breeding opportunities over time, being suitable for different species depending on the year. This alternation will contribute to the medium-term preservation of all species in the assemblage.5. It is highly relevant to preserve the natural dynamism and spatial variability of temporary pond systems, which will favour the conservation of populations through their intrinsic variability.

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“…Although previous studies have documented the importance of abiotic conditions for vernal-pool macroorganisms (3,9,10,12,18,20), little is known about abiotic influences on microorganisms. Given the abundance of vernal pools in the landscape (e.g., reference 5) and their highly variable physicochemical natures (2,4,6,17,19), vernal pools can serve as a model system to explore abiotic influences on microbial communities. Further, while the diversity of vernal-pool macroorganisms has been welldocumented, comparable studies of microbial biodiversity are rare (see reference 8 for a review).…”

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Temporal and Spatial Patterns of Eukaryotic and Bacterial Communities Found in Vernal Pools

Carrino‐Kyker

Swanson

2008

Appl Environ Microbiol

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In this study, we examined the effects of physicochemical variability on the microbial communities of vernal pools. Denaturing gradient gel electrophoresis revealed temporal changes to be more pronounced than spatial changes in eukaryotic and bacterial communities. Sequencing revealed high degrees of richness in decomposers, which supports the notion that vernal pools are heterotrophic habitats.Vernal pools are seasonally flooded ecosystems that are subject to variability in abiotic conditions (8). Although previous studies have documented the importance of abiotic conditions for vernal-pool macroorganisms (3,9,10,12,18,20), little is known about abiotic influences on microorganisms. Given the abundance of vernal pools in the landscape (e.g., reference 5) and their highly variable physicochemical natures (2,4,6,17,19), vernal pools can serve as a model system to explore abiotic influences on microbial communities. Further, while the diversity of vernal-pool macroorganisms has been welldocumented, comparable studies of microbial biodiversity are rare (see reference 8 for a review). In one survey of a single snowmelt pool, 76% of the identified biota were protists or bacteria (15), which suggests that these organisms dominate temporary water bodies in terms of both species richness and abundance (8). The main objective of this study was to characterize the microbial (eukaryotic and bacterial) communities of vernal pools in northeastern Ohio and to illustrate any spatial and temporal variations in these communities in relation to abiotic factors.This study was conducted at Case Western Reserve University's Squire Valleevue and Valley Ridge Farms (41°29Ј53ЉN, 81°25Ј27ЉW; elevation, 320 m), where five vernal pools (one man-made pool, called the salamander pond, and four natural pools), which ranged in size from 16 to 20 m 2 , were studied. The pools were located within an 80-year-old secondarygrowth forest, which is characterized by well-drained, silt loam soils and a canopy dominated by Acer saccharum and Fagus grandifolia. From each pool, overlying water, organic detritus (i.e., leaf matter), and soil were collected on 1 April, 4 May, and 2 June 2004. These three collection times were shortly after snow melting and prior to the drying of the pools. Three replicate samples (of each sample type) were collected from the shore of each pool and combined. Specifically, soil samples were cores collected with sterile 1-ml pipette tips, and water samples were collected with 0.2-m-pore-size polycarbonate filters through which 50 ml of water was filtered. At the time of sampling, dissolved oxygen concentrations, pHs, average depths, and terrestrial light levels were measured in situ. Relative conductivities of water samples were determined in the lab.Community profile analysis was carried out by PCR-denaturing gradient gel electrophoresis (DGGE). DGGE was performed first to compare a subset of pool samples (three pool samples from three different sampling dates) of each individual sample type (water, soil, and organic detritu...

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Zooplankton communities across a hydroperiod gradient of temporary ponds in the Doñana National Park (SW Spain)

Cited by 76 publications

References 40 publications

Evidence of Hydroperiod Shortening in a Preserved System of Temporary Ponds

Evidence of Hydroperiod Shortening in a Preserved System of Temporary Ponds

Inter‐annual variability in amphibian assemblages: implications for diversity assessment and conservation

Temporal and Spatial Patterns of Eukaryotic and Bacterial Communities Found in Vernal Pools

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