Spatial distribution of Aegla rostrata Jara, 1977 (Decapoda, Anomura, Aeglidae) in the littoral of Pullinque Lake (39°S, North Patagonia, Chile)

Ríos, Patricio De los; Farías, Jorge G.; Suazo, Maria J.

doi:10.1163/15685403-00003861

Cited by 2 publications

References 29 publications

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Distribution pattern in Aegla uruguayana Schmitt, 1942 (Decapoda: Anomura: Aeglidae): temporal and spatial approach

Diawol

Musin

Collins

et al. 2021

Journal of Crustacean Biology

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The presence, density, and distribution pattern of a species in a particular space and time result from evolutionary and ecological processes. We evaluated the density and spatial distribution pattern of the freshwater anomuran crab, Aegla uruguayanaSchmitt, 1942, in relation to temporal and spatial scales. The temporal scale followed a seasonal analysis, and the space scale was evaluated from the study of three streams located in different provinces of Argentina. Specimens were collected in four sampling campaigns during spring, summer, autumn, and winter in three temperate freshwater environments of the La Plata Basin, Argentina, using 1 m2 sampling units. The density varied according to the studied populations and was not by seasonality. The distribution pattern was not influenced by the evaluated scales. The A. uruguayana populations presented a clumped pattern showing a negative binomial distribution. A possible cause of such a pattern is the strong environmental heterogeneity of the three studied sites. The species presented gregarious behavior that could be associated with the spatial arrangement of the shelters available in the particular habitats as well as ecological strategies for optimal and efficient use of resources in these topographies. Our study is the first on the dynamics of the distribution in terms of temporal and spatial scopes of a species of AeglaLeach, 1820, an endemic freshwater anomuran.

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Distribution pattern in Aegla uruguayana Schmitt, 1942 (Decapoda: Anomura: Aeglidae): temporal and spatial approach

Diawol

Musin

Collins

et al. 2021

Journal of Crustacean Biology

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Population and community macroinvertebrates characterization in ephemeral stream in north Patagonian perennial forest relict (Rucamanque, 38°S, Araucanía, Chile)

Ríos-Escalante,

González-Arratia,

Cid-Alda

et al. 2024

Preprint

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The benthic macroinvertebrates in Patagonian streams are characterized by the presence of abundant aquatic insect larvae stages and crustaceans that can be used as water quality bioindicators. The studied site is an ephemeral stream, present only during rainy season and located in Rucamanque, a north patagonian park that is a relict of pristine perennial forest located at the northwest side of Temuco city. Benthic macroinvertebrates were first studied at population level, considering the spatial distribution of the taxa reported to determine if macroinvertebrates have a random, uniform or aggregated pattern with respective Poisson, binomial and negative binomial distribution. As second step, data were studied at community scale using null models, based on random presence on species co-occurrence and niche sharing. The results revealed that taxa such as Nematoda, presented a random and in consequence a Poisson distribution, while other groups such as Neuroperlopsis sp. (Plecoptera order), Psephenidae (Diptera order) and Aegla sp. (Decapoda order) presented a uniform with binomial distribution, and species from Diptera order such as; Tipulidae, Simulidae, Chironomidae, from Plecoptera order such as Diamphinopsis sp., from Ephenoptera order such as Leptophlebiidae and Chiloporter sp, from order Trichoptera (Smicridea sp) and Oligochaeta (Tubifex sp.) presented an aggregated negative binomial distribution. The results of null models’ analysis revealed that species associations were random, whereas the taxa share niche due interspecific competition. The exposed results of spatial distribution and null models were similar to previous observations in other Patagonian pristine rivers. At population level, only Nematoda had random distribution whereas at community level the random presence of species co-occurrence is due the presence of low species number with many repeated taxa by sample, that also would have niche sharing.

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Spatial distribution of Aegla rostrata Jara, 1977 (Decapoda, Anomura, Aeglidae) in the littoral of Pullinque Lake (39°S, North Patagonia, Chile)

Cited by 2 publications

References 29 publications

Distribution pattern in Aegla uruguayana Schmitt, 1942 (Decapoda: Anomura: Aeglidae): temporal and spatial approach

Distribution pattern in Aegla uruguayana Schmitt, 1942 (Decapoda: Anomura: Aeglidae): temporal and spatial approach

Population and community macroinvertebrates characterization in ephemeral stream in north Patagonian perennial forest relict (Rucamanque, 38°S, Araucanía, Chile)

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