Dispersal of aquatic invertebrates by lesser black-backed gulls and white storks within and between inland habitats

Martin-Velez Victor; Sanchez Marta I.; Lovas-Kiss AdamHortas FranciscoGreen Andy J.

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Dispersal of aquatic invertebrates by lesser black-backed gulls and white storks within and between inland habitats

机译：Dispersal of aquatic invertebrates by lesser black-backed gulls and white storks within and between inland habitats

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Waterbirds can transport aquatic invertebrates internally, contributing to metapopulation dynamics between aquatic habitats in a terrestrial matrix. However, research into this dispersal process to date has focused on individual field sites or laboratory studies. We investigated the invertebrates dispersed by endozoochory by the lesser black-backed gull Larus fuscus wintering in Andalusia, south-west Spain in 2016-2017, comparing seven sites interconnected by their movements, with different degrees of anthropogenization [three landfills, two saltpan complexes, a natural lake, and a large (370 km(2)) ricefield area]. In the ricefields, we also compared invertebrates dispersed by gulls with those dispersed by the larger white stork Ciconia ciconia. A total of 642 intact invertebrates and their propagules (mainly plumatellid bryozoans, cladocerans, and other branchiopods) were recorded in excreta (faeces and pellets) from gulls and storks. A greater diversity and abundance of invertebrates were recorded in ricefields, notably 43 individuals of the alien snail Physella acuta. One snail was still alive in a gull pellet 3 weeks after being stored in a fridge. This represents the first record of snail dispersal within waterbird pellets. Viability was also confirmed for the cladoceran Macrothrix rosea recorded in ricefields, and the alien brine shrimp Artemia franciscana recorded mainly in saltpans. In ricefields, gulls and pellets had significantly fewer propagules and fewer taxa per gram of excreta than storks and faeces, respectively. Through their high mobility, gulls and storks can disperse invertebrates between different natural and artificial habitats, and even to landfills. They can promote metapopulation dynamics for native bryozoans and branchiopods, but also the spread of invasive snails and brine shrimp.

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《Aquatic sciences》 |2022年第1期|10.1-10.10|共10页
作者
Martin-Velez Victor; Sanchez Marta I.; Lovas-Kiss AdamHortas FranciscoGreen Andy J.;
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作者单位

CSIC, Dept Wetland Ecol, Estn Biol Donana, Americo Vespucio 26, Seville 41092, Spain;

CSIC, Dept Wetland Ecol, Estn Biol Donana, Americo Vespucio 26, Seville 41092, Spain|Univ Seville, Fac Biol, Dept Biol Vegetal & Ecol, Seville 41012, Spain;

Ctr Ecol Res, Dept Tisza River Res, Wetland Ecol Res Grp, Bem Ter 18-C, H-4026 Debrecen, HungaryUniv Cadiz, Inst Univ Invest Marina INMAR, Campus Excelencia Int Global Mar CEI MAR, Ave Republ Saharaui S-N, Cadiz 11510, Spain;

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收录信息美国《科学引文索引》(SCI);
原文格式 PDF
正文语种英语
中图分类
关键词
Artemia; Cladocera; Endozoochory; Gastropoda; Waterbirds;

Dispersal of aquatic invertebrates by lesser black-backed gulls and white storks within and between inland habitats

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