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Wintering waterbird assemblages in the central part of the Gulf of Gabes in southern Tunisia

机译：突尼斯南部加布斯湾中部越冬的水鸟组合

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Although the Gulf of Gabes is recognised as an Important Bird Area, several aspects of the ecology of waterbirds inhabiting this area still need to be investigated. We observed how waterbird foraging guilds varied among habitats. In total, 49 species belonging to 16 families were recorded. Winter visitors accounted for 73% of counts. The avifauna was dominated by shorebirds (52% of records), followed by large wading birds (25%), open-water birds (18%) and waterfowl (5%). However, the structure of local waterbird communities and their composition in terms of foraging guilds varied according to habitat type. The bird communities of sandy beaches were dominated by open-water birds, whereas large mudflats were dominated by shorebirds, and wadi estuaries showed a more even representation of foraging guilds. Locally rare species had narrow distributions, whereas locally abundant species were found widely within the gulf. For four species the 1% population level criterion of the Ramsar Convention was exceeded. Overall, our results show that the Gulf of Gabes hosts important numbers of waterbirds with different ecological requirements, which confirms the importance of this gulf as a wintering area for Palearctic waterbirds.
机译：尽管加布斯湾被认为是重要的鸟类栖息地，但仍需要对栖息在该地区的水鸟生态学进行一些研究。我们观察了水鸟觅食行会如何在栖息地之间变化。总共记录了16个科的49种。冬季游客占总数的73％。鸟类以shore鸟为主（占记录的52％），其次是大型涉水鸟（25％），开阔水禽（18％）和水禽（5％）。但是，当地水鸟群落的结构及其觅食行会的组成根据栖息地类型而异。沙滩上的鸟类群落以开阔水域鸟类为主导，而大型滩涂则以shore鸟为主导，而瓦迪河口则表现出觅食行会的更为均匀。当地稀有物种分布狭窄，而在海湾内广泛发现本地丰富物种。对于四个物种，超出了《拉姆萨尔公约》的1％人口水平标准。总体而言，我们的结果表明，加布斯湾拥有大量具有不同生态要求的水鸟，这证实了该海湾作为古北水鸟越冬地区的重要性。

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