Abundance and Diurnal Time Activity Budget of the Threatened Species White-Headed Ducks (Anatidae: Oxyura leucocephala) in an Unprotected Area, Boussedra Marsh, Northeast Algeria

Q3 Environmental Science

Ekologia Bratislava Pub Date : 2021-12-01 DOI:10.2478/eko-2021-0040

Hennouni Mohamed Amine, Zebsa Rabah, Bensakhri Zinette, Youcefi Abdeldjalil, Bara Mouslim, Atoussi Sadek, Djekoune Mohammed, S. Menouar, Houhamdi Moussa

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引用次数: 2

Abstract

Abstract The white-headed duck is a globally threatened species and its populations have become fragmented and undergone major decline in recent decades. Changes including long-term abundance (five times from 2005 to 2018) and diurnal activity budget (2010−2011 and 2017−2018) with respect to the effect of habitat features at Boussedra marsh (unprotected area) were compiled in order to fill some gaps in the status and trend of North African populations. The population size of the white-headed duck decreased over years from 2010 to 2018 by about 52.81%, and was positively associated with interior vegetation area, but not significantly with water surface area. Trends of population dynamics differed among seasons, and the number was higher in wintering than breeding season. Sleeping (44.93%, 23.74%) and feeding (59.09%, 27.43%) were the dominant diurnal activities at both the years of study, respectively. Boussedra marsh plays an important ecological role as a diurnal forging habitat and reproduction site for this threatened species and as a shelter for other waterfowl.

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阿尔及利亚东北部Boussedra沼泽无保护区内受威胁物种白头鸭（Anatidae:Oxyura leuccephala）的丰度和昼夜活动预算

摘要白头鸭是一种受到全球威胁的物种，近几十年来，其种群数量已变得支离破碎，并经历了大幅下降。编制了包括长期丰度（2005年至2018年五次）和昼夜活动预算（2010年至2011年和2017年至2018年间）在内的变化，这些变化与Boussedra沼泽（无保护区）栖息地特征的影响有关，以填补北非人口状况和趋势方面的一些空白。从2010年到2018年，白头鸭的种群规模逐年下降约52.81%，与内部植被面积呈正相关，但与水面面积无显著关系。种群动态随季节变化趋势不同，越冬期种群数量高于繁殖期。在这两个研究年份，睡眠（44.93%，23.74%）和进食（59.09%，27.43%）分别是主要的昼夜活动。Boussedra沼泽作为这种濒危物种的日间锻造栖息地和繁殖地，以及其他水禽的庇护所，发挥着重要的生态作用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Ekologia Bratislava Environmental Science-Ecology

CiteScore

1.80

自引率

0.00%

发文量

审稿时长

10 weeks

期刊介绍： The Journal Ecology (Bratislava) places the main emphasis on papers dealing with complex characteristics of ecosystems. Treated are not only general, theoretical and methodological but also particular practical problems of landscape preservation and planning. The ecological problems of the biosphere are divided into four topics: ecology of populations: study of plant and animal populations as basic components of ecosystems, ecosystem studies: structure, processes, dynamics and functioning of ecosystems and their mathematical modelling, landscape ecology: theoretical and methodical aspects, complex ecological investigation of territorial entities and ecological optimization of landscape utilization,