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首页> 外文期刊>Oryx >Riparian old-growth forests provide critical nesting and foraging habitat for Blakiston's fish owl Bubo blakistoni in Russia
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Riparian old-growth forests provide critical nesting and foraging habitat for Blakiston's fish owl Bubo blakistoni in Russia

机译：河岸的古老森林为俄罗斯的布拉基斯顿的鱼owl腹泻提供重要的筑巢和觅食栖息地。

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摘要

Conservation efforts for Blakiston's fish owl Bubo blakistoni in Russia are limited, partly because habitat use by these rare owls is poorly known. We therefore studied nesting and foraging habitat characteristics of Blakiston's fish owls in Primorye, Russia. We sampled habitat at 14 nest sites, 12 nest stand sites and 13 random sites; we also sampled rivers within 14 fish owl home ranges across our 20,213 km2 study area. We found that large old trees and riparian old-growth forest were the primary characteristics of nest and foraging sites, respectively. Large trees were probably used as nest sites because they have cavities large enough to accommodate these birds. Big trees are also important because they are primary sources of large woody debris in rivers, which enhances suitable habitat for salmon, the owl's primary prey. Based on habitat characteristics, nest sites were correctly distinguished from random sites 74% (Kappa = 0.48) of the time, nest stands from random sites 56% (Kappa = 0.12) of the time, and used sites from available foraging sites 68% (Kappa = 0.36) of the time. The management and conservation of old-growth forests is essential for sustaining this species because they are central to the owls' nesting and foraging behaviour. Moreover, conservation of these forests sustains habitat for many other species.
机译：俄罗斯Blakiston的鱼类猫头鹰Bubo blakistoni的保护工作受到限制，部分原因是这些稀有猫头鹰的栖息地使用情况鲜为人知。因此，我们研究了俄罗斯滨海边疆区布拉基斯顿鱼fish的筑巢和觅食栖息地特征。我们在14个巢点，12个巢站和13个随机点采样了栖息地。我们还在20,213平方公里的研究区域内的14个猫头鹰居所范围内对河流进行了采样。我们发现，大型的老树和河岸的老树林是巢和觅食地的主要特征。大树可能被用作筑巢地点，因为它们的空洞足以容纳这些鸟类。大树也很重要，因为它们是河流中大块木屑的主要来源，这为鲑鱼（猫头鹰的主要猎物）增加了合适的栖息地。根据栖息地的特征，正确地将巢点与随机地点的时间区别为74％（Kappa = 0.48），将嵌套立场与随机点的时间比例分别为56％（Kappa = 0.12），将可用地点从可用的觅食点中隔离为68％（此时的Kappa = 0.36）。旧森林的管理和保护对于维持该物种至关重要，因为它们对猫头鹰的筑巢和觅食行为至关重要。此外，对这些森林的保护为许多其他物种提供了栖息地。

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