Colonial and Non-Colonial Birds Breeding on Dredge-Spoil Islands in a Tropical Wetland in Mexico

IF 0.7 4区生物学 Q3 ORNITHOLOGY

Waterbirds Pub Date : 2023-11-22 DOI:10.1675/063.046.0108

G. Leyva-García, Jaqueline García-Hernández, J. A. Castillo‐Guerrero, Eduardo Palacios

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引用次数: 0

Abstract

Abstract. In 2012, 11 small islands were created by the deposition of sediment from dredging operations in connection with the creation of navigation channels, along the main canal of Bahía Tóbari, Sonora, Mexico. During the breeding seasons of 2017–2019 and 2021–2022, we conducted repeated boat surveys each season, and documented 12 species of birds breeding on these islands, including eight species of colonial waterbirds, three shorebirds, and one owl. The number of breeding species varied between 7 (2017) and 11 (2019), and the number of breeding pairs varied between 1,686 (2017) and 17,970 (2018). From 2017 to 2018, there was a ten-fold increase in the total number of pairs (from 1,686 to 17,970), then it decreased to 8,482 pairs by 2022. Royal Tern (94 fold) and Elegant Tern (31 fold) were the species whose numbers increased the most from one year to the next. Six of these species are federally listed in Mexico, and five of them were not previously recorded as breeders in the bay. The number of pairs of Elegant Tern, Black Skimmer, and American Oystercatcher are 10%, 15%, and 7% of their biogeographic population, respectively, and therefore this site qualifies as an Important Bird and Biodiversity Area.

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在墨西哥热带湿地疏浚岛繁殖的殖民鸟类和非殖民鸟类

摘要2012 年，在墨西哥索诺拉州托巴里港主干运河沿岸，由于疏浚作业造成的沉积物沉积，形成了 11 个小岛屿。在 2017-2019 年和 2021-2022 年的繁殖季节，我们每个季节都进行了重复的乘船调查，记录了在这些岛屿上繁殖的 12 种鸟类，包括 8 种殖民地水鸟、3 种岸鸟和 1 种猫头鹰。繁殖物种数量在 7 种（2017 年）和 11 种（2019 年）之间变化，繁殖对数在 1,686 对（2017 年）和 17,970 对（2018 年）之间变化。从 2017 年到 2018 年，配对总数增加了 10 倍（从 1 686 对增加到 17 970 对），然后到 2022 年减少到 8 482 对。皇家燕鸥（94 倍）和优雅燕鸥（31 倍）是每年数量增长最多的物种。这些物种中有 6 种被联邦列入墨西哥名录，其中 5 种以前没有在海湾繁殖的记录。优雅燕鸥、黑掠鸟和美洲蛎鹬的对数分别占其生物地理种群的 10%、15% 和 7%，因此该地点符合重要鸟类和生物多样性区的条件。

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来源期刊

Waterbirds 生物-鸟类学

CiteScore

1.30

自引率

0.00%

发文量

审稿时长

6-12 weeks

期刊介绍： Waterbirds is an international scientific journal of the Waterbird Society. The journal is published four times a year (March, June, September and December) and specializes in the biology, abundance, ecology, management and conservation of all waterbird species living in marine, estuarine and freshwater habitats. Waterbirds welcomes submission of scientific articles and notes containing the results of original studies worldwide, unsolicited critical commentary and reviews of appropriate topics.