木材采伐对南非东开普省南部原生Mistbelt森林中角鹦鹉(Poicephalus robustus)巢穴可用性的影响

IF 1.5 4区 环境科学与生态学 Q3 BIODIVERSITY CONSERVATION
Jessica Leaver, J. Carstens, K. Wimberger, Kate F. Carstens, M. Cherry
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引用次数: 1

摘要

南非东开普省的Amathole mistbelt森林拥有最大的国家濒危地方性开普鹦鹉(Poicephalus robustus)残余种群,这是一种次级腔巢,其持久性受到合适巢穴地点的限制。这也是角鹦鹉范围内唯一允许选择性采伐木材的森林,但采伐对鹦鹉巢穴可用性的影响尚未调查。本研究旨在确定当前收获选择标准对巢址可用性的影响程度。结果表明,角鹦鹉对巢树有特定的要求;在选择筑巢和采伐的树木的种类和条件上存在重叠。在该地区发现的两种黄木,Afrocarpus falcatus和Podocarpus latifolius,占采伐树木的大部分(78%),以及角鹦鹉巢树(79%)。此外,Cape Parrot和harvest的选择标准都要求大(胸高直径≥50 cm);≥12米高),老的,死的,垂死的,或树冠受损的黄杉,因此,32%的树木被认为是潜在的筑巢树也是采伐的候选者。目前的选择标准需要修订,以确保木材的使用与阿马托尔森林的生物多样性保护相一致。我们建议停止采伐枯木;而且,对树冠受损的活树的采伐(这些树经常被鹦鹉用来筑巢)受到物种特有的最大可采伐直径的限制。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The impact of timber harvesting on nest site availability for the Cape Parrot Poicephalus robustus in native Southern Mistbelt forests of the Eastern Cape, South Africa
Summary The Amathole mistbelt forests in the Eastern Cape, South Africa harbour the largest remnant population of the nationally endangered endemic Cape Parrot Poicephalus robustus, a secondary-cavity nester whose persistence is limited by suitable nest sites. These are also the only forests within Cape Parrot range in which selective timber harvesting remains permitted, but the impact of harvesting on the availability of parrot nest sites has not been investigated. This study aimed to determine the degree to which current harvest selection criteria stand to impact nest site availability. Results showed that Cape Parrots have specific nest tree requirements; and that there is overlap in the species and condition of trees selected for nesting, and harvesting. The two yellowwood species found in the region, Afrocarpus falcatus and Podocarpus latifolius, represented the majority of both harvested trees (78%), and Cape Parrot nest trees (79%). Moreover, both Cape Parrot and harvest selection criteria require large (≥50 cm diameter at breast height; ≥12 m high), old, dead, dying, or crown-damaged yellowwoods, such that 32% of trees considered potential nest trees were also candidates for harvesting. Current selection criteria need to be revised to ensure that timber use is compatible with biodiversity conservation in the Amathole forests. We suggest that all harvesting of dead standing yellowwoods be discontinued; and that the harvesting of live trees with crown damage, which are frequently used by parrots for nesting, be limited by a species-specific maximum harvestable diameter.
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来源期刊
CiteScore
3.40
自引率
6.20%
发文量
50
审稿时长
>12 weeks
期刊介绍: Bird Conservation International is a quarterly peer-reviewed journal that seeks to promote worldwide research and action for the conservation of birds and the habitats upon which they depend. The official journal of BirdLife International, it provides stimulating, international and up-to-date coverage of a broad range of conservation topics, using birds to illuminate wider issues of biodiversity, conservation and sustainable resource use. It publishes original papers and reviews, including targeted articles and recommendations by leading experts.
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