阿根廷两个作为保护区或牧场管理的卡尔德恩森林中的树洞和树洞使用者

IF 2.6 3区 环境科学与生态学 Q2 ECOLOGY
Fernando G. López , M. Emilia Rebollo , Laura A. Bragagnolo , Miguel A. Santillán , Paula M. Orozco Valor , Gimena Pizzarello , Igor Berkunsky , Juan M. Grande
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引用次数: 0

摘要

需要树洞的动物种群数量可能有限,也可能结构复杂,这取决于生态系统中树洞的质量和可用性。在过去的一个世纪中,阿根廷的卡尔登森林由于人为活动而经历了严重的栖息地退化。在这里,我们报告了卡尔登森林中两种不同管理类型地区(保护区和放牧区)的树洞密度和特征及其脊椎动物使用者。蛀洞的平均密度为 16.1 个/公顷。然而,保护区的蛀洞密度是牧场的四倍(19.5 对 5.8)。蛀洞及其支撑树的特征有很大差异,但不同地点之间基本相似。有 44 种脊椎动物使用或可能使用树洞。在保护区,有记录的物种使用蛀洞的比例更高(30/41 对 6/32;p < 0.01)。虽然半干旱森林中的大多数蛀洞使用者并未受到威胁,但这一生态系统已被严重破坏,仅剩下其原有面积的11%。如果人类活动继续改变这一脆弱的生态系统,未来包括穴居鸟在内的许多物种的数量都有可能下降。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Tree cavities and cavity users in two caldén forests of Argentina managed as a protected area or for cattle ranching

Tree cavities and cavity users in two caldén forests of Argentina managed as a protected area or for cattle ranching

Animal populations that require tree cavities can be either limited or structured depending on the quality and availability of tree cavities in their ecosystems. Over the last century, the Caldén forest of Argentina has experienced severe habitat degradation due to anthropogenic activities. Here, we report the density and characteristics of cavities and their vertebrate users in areas of the Caldén forest with two different types of management: a protected area and an area with cattle ranching. The average density of cavities was 16.1 cavities/ha. However, the reserve's cavity density was four times higher than the ranch's (19.5 vs. 5.8 cavities/ha). The characteristics of the cavities and their support trees showed significant variations, but they were generally similar between sites. Forty-four vertebrate species use or may use tree cavities. The proportion of recorded species using cavities in the reserve was higher (30/41 vs. 6/32; p < 0.01). While most cavity users in the semi-arid forest are not threatened, this ecosystem has been dramatically fragmented, with only 11% of its original area remaining. If anthropogenic activities continue to alter this fragile ecosystem, it is possible that in the future, many species, including tree cavity nesters, will suffer a decline in their populations.

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来源期刊
Journal of Arid Environments
Journal of Arid Environments 环境科学-环境科学
CiteScore
5.70
自引率
3.70%
发文量
144
审稿时长
55 days
期刊介绍: The Journal of Arid Environments is an international journal publishing original scientific and technical research articles on physical, biological and cultural aspects of arid, semi-arid, and desert environments. As a forum of multi-disciplinary and interdisciplinary dialogue it addresses research on all aspects of arid environments and their past, present and future use.
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