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Drivers of snag fall rates in Fennoscandian boreal forests 芬诺斯坎德北方森林中雪撬脱落率的驱动因素
IF 5 1区 环境科学与生态学 Q1 BIODIVERSITY CONSERVATION Pub Date : 2024-08-17 DOI: 10.1111/1365-2664.14729
Tuomas Aakala, Ken Olaf Storaunet, Bengt Gunnar Jonsson, Kari T. Korhonen

立木枯死的持续性是决定其对生物多样性和枯木相关碳通量作用的重要因素。不同树种和地区的枯木倒伏速度差异很大,而且还受到各种林地和树木层面因素的影响。然而,我们对这种变化的了解充其量只是零散的,部分原因是缺乏经验数据。在此,我们利用了芬兰、挪威和瑞典国家森林资源清查项目自 20 世纪 90 年代中期以来积累的钉耙观测时间序列。我们首先统一了来自略有不同的清查协议的观测数据,然后利用这一统一的数据集(约有 43,000 个观测数据,普查时间间隔为 5 年),使用贝叶斯逻辑回归建模法,将北方主要树种欧洲赤松(Pinus sylvestris)、黑松(Picea abies)和桦树(Betula spp.这些模型在预测木栓屹立或倒塌方面表现一般,不同树种的正确分类率从 68% 到 75% 不等。一般来说,木渣的持久性随树木大小和气候湿度的增加而增加,随温度总和、衰变阶段的提前、地点生产力和干扰强度(主要是采伐)的增加而减少。综述与应用:采伐的影响表明,在造林作业中保护翘柏是增加受管理森林翘柏数量的有效途径。在气候变暖的未来,杉木梢的持续时间与温度之间的负相关关系表明,杉木梢的持续时间会缩短,从而降低相关物种的栖息地可用性。由于秋季过后分解率通常会增加,木耙持久性的降低也意味着枯木碳释放的速度大大加快。
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引用次数: 0
Incorporating density-dependent regulation into impact assessments for seabirds 将密度调节纳入海鸟影响评估
IF 5 1区 环境科学与生态学 Q1 BIODIVERSITY CONSERVATION Pub Date : 2024-08-15 DOI: 10.1111/1365-2664.14750
Eve Merrall, Jonathan A. Green, Leonie A. Robinson, Adam Butler, Matt J. Wood, Mark A. Newell, Julie Black, Francis Daunt, Catharine Horswill

在新开发项目的审批过程中,许多行业都需要进行种群生存能力分析(PVA),以确定对受保护种群的潜在影响。然而,这些评估很少考虑密度对人口增长率的影响。在基于 PVA 的影响评估中排除密度依赖性调节通常被认为可提供影响的最大估计值,因此可提供一种预防性评估方法。然而,也有人担心这种做法可能会不必要地阻碍重要产业的发展,如近海可再生能源。在这项研究中,我们评估了 31 个海鸟种群的繁殖成功率与密度相关的调节。然后,我们使用八种不同的公式来量化这种调节的强度和形式。最后,我们使用 PVA 检验了每种公式如何影响观察到的动态再现(即模型验证),以及预测的种群对外部威胁的绝对和相对响应(即模型预测)。我们发现了海鸟繁殖成功率的负调控(n = 3)和正调控(n = 5)证据。在表现出负向调节的种群中,基于 PVA 的影响评估排除了密度依赖性调节,导致种群增长失控,模型结果在生物学上变得不可信。相比之下,在表现出正向调节的种群中,剔除密度依赖性调节可以适当重建观察到的动态变化,但在某些种群中,种群数量的下降被低估了。我们发现,密度依赖性的多种表述在分析的检测、验证和预测阶段表现相当。不过,我们初步建议在影响评估中使用对数线性分布或 Weibull 分布来描述海鸟繁殖成功率的密度依赖性调节,以便在准确性与谨慎性之间取得平衡。最后,我们表明,影响评估的相对 PVA 指标并不一定能用于克服 PVA 的错误规范,因为在正向调节的种群中,假设密度是独立的。综述与应用:我们建议,在对海鸟种群进行基于 PVA 的评估时,采用与密度相关的方法可防止不符合生物学实际的、无约束的种群增长,从而确保在经历负面调控的种群中采用有意义的 PVA 指标。它还能为正向调节的种群保持一种预防性方法,这在估计对这些更脆弱种群的影响时至关重要。这些结论可立即应用于海洋工业的同意程序中。
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引用次数: 0
Sounds of the underground reflect soil biodiversity dynamics across a grassy woodland restoration chronosequence 地下的声音反映了草地林地恢复年序中土壤生物多样性的动态变化
IF 5 1区 环境科学与生态学 Q1 BIODIVERSITY CONSERVATION Pub Date : 2024-08-15 DOI: 10.1111/1365-2664.14738
Jake M. Robinson, Alex Taylor, Nicole Fickling, Xin Sun, Martin F. Breed

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引用次数: 0
A technological biodiversity monitoring toolkit for biocredits 生物信用的生物多样性技术监测工具包
IF 5 1区 环境科学与生态学 Q1 BIODIVERSITY CONSERVATION Pub Date : 2024-08-14 DOI: 10.1111/1365-2664.14725
Helen V. Ford, Franziska Schrodt, Alexandra Zieritz, Daniel A. Exton, Geertje van der Heijden, Jonathan Teague, Tim Coles, Richard Field

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引用次数: 0
Ecology and conservation under ageing and declining human populations 老龄化和人口减少情况下的生态与保护
IF 5 1区 环境科学与生态学 Q1 BIODIVERSITY CONSERVATION Pub Date : 2024-08-13 DOI: 10.1111/1365-2664.14758
Lorenzo Marini, Péter Batáry, Rachel Carmenta, Kevin J. Gaston, Rowena Gordon, Cate Macinnis-Ng, Akira S. Mori, Martin Nuñez, Jos Barlow

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引用次数: 0
Cattle and nurse trees shape subtropical forest–grassland ecotones 牛和哺育树塑造了亚热带森林-草原生态区
IF 5 1区 环境科学与生态学 Q1 BIODIVERSITY CONSERVATION Pub Date : 2024-08-12 DOI: 10.1111/1365-2664.14753
Milena Holmgren, Edwin Bargeman, Rafael Bernardi, Alice Blok, Jasper Buijs, Ivan Raniero Hernández-Salmerón, Rocío Martínez-Cillero, Nestor Mazzeo, Bart Verdijck

南美洲的亚热带地貌以开阔草原和森林-草原交错地貌为主。森林通常局限于河流边缘,森林-草原生态带十分明显。了解维持森林-草原生态区的机制对于预测气候变化和干扰机制对这些生物群落的范围及其提供的生态系统服务的影响非常重要。我们采用实地调查和长期野外实验相结合的方法,探索了南美洲坎波斯地区乌拉圭中部河流森林和草地生态区树木覆盖面积扩大的原因。我们评估了树种传播和树苗建立限制的作用,并通过实验测试了牛、哺育树覆盖和草对森林-草地生态区森林和草地树种新陈代谢的影响。我们发现,森林的扩张取决于牛群和哺育树之间的相互作用。Vachellia caven 树成功地在草地上定植,并通过促进林木物种的种子积累和幼苗成活来促进森林斑块的形成。令人惊讶的是,草地覆盖对林木幼苗的早期成活率大多有积极影响。然而,牛限制了树苗的生长和存活,尤其是林木树种。这导致了树斑的核植被模式,最终限制了森林的扩展。综合与应用。在亚热带南美草原上,树木覆盖面积有可能扩大。与气候变化相关的牛群密度降低和降雨量增加可能会促进该地区的森林扩张。
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引用次数: 0
Land use history and landscape forest cover determine tropical forest recovery 土地使用历史和景观森林覆盖率决定热带森林的恢复
IF 5 1区 环境科学与生态学 Q1 BIODIVERSITY CONSERVATION Pub Date : 2024-08-12 DOI: 10.1111/1365-2664.14754
Iris Hordijk, Lourens Poorter, Jorge A. Meave, Frans Bongers, Masha T. van der Sande, Rey David López Mendoza, Pascual Jamangapé Romero, Johan de Jong, Miguel Martínez-Ramos

为了保护生物多样性和应对气候变化,恢复森林生态系统至关重要。自然森林再生长是一种基于自然的森林恢复方案,但很少有人评估过自然森林再生长如何受到以前土地使用强度和周围森林覆盖率的综合影响,以及在两种主要热带森林类型(干燥森林和湿润森林)之间的差异。研究人员在墨西哥热带雨林干旱地区(13 块)和湿润地区(20 块)的废弃农田上建立了 33 个地块,对以下树木群落属性进行了为期 3 年的监测:结构、多样性、再生模式、与固氮菌和菌根真菌的潜在共生关系。通过访谈对以前的土地利用强度进行了描述,并利用卫星图像对地块周围 1000 米半径范围内的景观森林覆盖率和破碎度进行了量化。变量重要性分析表明,对于 3 年后树木群落属性的状态而言,土地利用强度比森林覆盖率和破碎度更重要。这表明,以前的土地利用影响了演替的开始,并给植被留下了重要的遗产。土地利用强度、森林覆盖率和破碎度对树木群落属性随时间的变化具有同等重要的决定作用,这表明管理措施和散布都会影响群落的组合。较高的土地利用强度会降低树木丰富度的恢复,而最大森林斑块的面积会降低树木密度,这些斑块的连通性会增加树木密度。与湿润森林相比,干燥森林的树木密度恢复速度更快,这得益于较高的初始重新萌发能力和非生物分散的树木。综述与应用:较高的土地利用强度和破碎化的森林景观都会降低森林恢复的速度,这表明人类行为和景观改造影响着演替的进程。在以前土地利用强度较低、森林连通性较高和物种非生物分散的地区,通过自然再生恢复破碎的森林景观更为合适。因此,有效的恢复应同时考虑土地使用历史和景观森林覆盖率,并适合当地的社会生态条件。
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引用次数: 0
Avian phylogenetic and functional diversity are better conserved by land-sparing than land-sharing farming in lowland tropical forests 在低地热带森林中,疏地耕作比分地耕作更能保护鸟类的系统发育和功能多样性
IF 5 1区 环境科学与生态学 Q1 BIODIVERSITY CONSERVATION Pub Date : 2024-08-08 DOI: 10.1111/1365-2664.14755
Giovanny Pérez, Simon C. Mills, Jacob B. Socolar, Diego E. Martínez-Revelo, Torbjørn Haugaasen, James J. Gilroy, David P. Edwards

为耕作而改变自然栖息地是热带生物多样性丧失的主要驱动因素。为减轻影响,人们提倡两种替代方法:加强农业生产以抵消保护区的影响(节省土地),或在农田内整合野生动物友好栖息地(共享土地)。在高山和干旱热带地区,系统发育和功能多样性是进化价值以及提供生态系统功能和服务的基础,最好通过土地共享来加以保护。我们以哥伦比亚亚马逊地区的养牛业为重点,调查了森林和牧场之间跨越野生动物友好特征梯度的 280 种鸟类的栖息地如何变化。然后,我们模拟了分地耕作和分地耕作的情景,以预测对系统发育和功能多样性指标的影响。然而,群落组合却有很大差异。对于大多数依赖森林的物种来说,野生动物友好型牧场是不够的,而系统发育和功能多样性指数在野生动物友好型特征梯度上的变化极小。与土地共享相比,土地共享始终保留了更高水平的费斯系统发育多样性(约30%)、功能丰富性(约20%)和进化上独特的系谱(约40%),而且在不同的景观规模上都是如此。在保护整个群落的系统发育和功能多样性方面,通过土地共享实践确保森林保护仍然优于土地共享:为了最大限度地减少亚马逊地区农耕造成的鸟类系统发育多样性和功能特征的损失,必须保护大片未受干扰的再生森林。在满足农业需求的同时,需要在现有农田内进行集约化耕作,以腾出空间,避免对土壤质量和其他生态系统服务造成长期负面影响,这种集约化耕作必须是可持续的。政策需要确保同时实施这两项行动。
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引用次数: 0
Resource limitation of compensatory responses in ecosystem processes after biodiversity loss 生物多样性丧失后生态系统过程补偿反应的资源限制
IF 5 1区 环境科学与生态学 Q1 BIODIVERSITY CONSERVATION Pub Date : 2024-08-07 DOI: 10.1111/1365-2664.14756
J. G. Hiddink, T. W. Davies

生物多样性的丧失可能导致重要生态系统过程的衰退。生物多样性丧失对生态系统功能的影响取决于丧失物种的功能贡献和其余物种的补偿反应。其余物种的补偿反应强度在多大程度上取决于资源的可用性,目前尚不清楚。在此,我们评估了在一个为期 7 年的实验中,在施肥和不施肥的情况下,盐沼植物群的初级生产如何对物种损失的现实序列做出反应。我们发现,只要有一个物种(Triglochin maritima)保留下来,在施肥的情况下,抗灭绝物种对群落初级生产总量中逐渐减少的物种几乎可以完全补偿。在不施肥的情况下,至少需要四个物种(包括特别丰富的物种车前子)才能维持群落初级生产总量。这些结果表明,抗灭绝物种对与生物多样性逐渐丧失相关的生态系统过程衰退的补偿程度取决于资源环境,植物物种丧失后的补偿可以通过增加资源可用性来加速。最终,完全补偿似乎受限于剩余群落中物种的存在和丰富程度,这些物种具有能够补偿丧失物种的特性。综述与应用:这些发现表明,大量生物多样性-生态系统实验的结论不能用于指导自然系统的管理,因为它们没有模拟真实的物种灭绝序列,因此不能量化现实世界中生态系统服务补偿的潜力。
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引用次数: 0
Flight behaviour of Red Kites within their breeding area in relation to local weather variables: Conclusions with regard to wind turbine collision mitigation 红鸢在其繁殖区内的飞行行为与当地天气变量的关系:关于减少风力涡轮机碰撞的结论
IF 5.7 1区 环境科学与生态学 Q1 BIODIVERSITY CONSERVATION Pub Date : 2024-08-05 DOI: 10.1111/1365-2664.14739
Janine Aschwanden, Herbert Stark, Felix Liechti
Birds and bats are prone to collisions with wind turbines. To reduce the number of bat collisions, weather variables are commonly used to shut down wind turbines when a certain constellation of weather variables occurs. Such a general approach might also be interesting to mitigate raptor collisions. Studies on the relationship between flight behaviour and weather variables are needed. To investigate the flight behaviour of raptors within their breeding area in relation to local weather variables, we used high resolution data of flight tracks of Red Kites collected on a wind energy test site (Germany). Birds were tracked with a laser range finder (LRF) or with Global Positioning System (GPS) transmitters. Weather variables were continuously registered on site. We used generalised linear mixed models to analyse the influence of weather variables and of the measurement method on different flight parameters. Furthermore, we investigated the probability of flying within a virtual rotor height range defined by three hub heights (84, 94 and 140 m; diameter: 112 m). The median flight altitude measured by LRF (52.5 m, 95% CI: 44.9–61.0, N = 2511) was on average 25 m higher than the corrected one resulting from GPS (27.8 m, 95% CI: 24.7–31.2, N = 6792). Flight speed also differed between methods (GPS: 29.2 km/h, 95% CI: 28.2–30.3 km/h; LRF: 25.1 km/h, 95% CI: 24.0–26.3 km/h). The effects of the weather variables were weak. Birds tended to fly less and lower during wet (humid, rainy or foggy) than dry weather, and lower during strong than weak winds. Probabilities of flying within a height range of virtual rotors increased with decreasing hub height, and hence ground clearance. Synthesis and applications: Flight behaviour was highly variable. Flights occurred during all weather conditions at different altitudes throughout the day over the entire season. Further research into the relationship between flight behaviour, weather variables, collisions and other factors is needed as a basis for developing shutdown regimes generally suitable for raptors. The mean flight altitude and speed differed between the measurement methods. Any values resulting from studies should be interpreted in the context of the method.
鸟类和蝙蝠很容易与风力涡轮机发生碰撞。为了减少蝙蝠碰撞的次数,通常会使用天气变量,在出现某种天气变量时关闭风力涡轮机。这种通用方法对减少猛禽碰撞也很有意义。需要对飞行行为与天气变量之间的关系进行研究。为了研究猛禽在其繁殖区内的飞行行为与当地天气变量之间的关系,我们使用了在风能试验场(德国)收集到的红鸢飞行轨迹的高分辨率数据。使用激光测距仪(LRF)或全球定位系统(GPS)发射器对鸟类进行跟踪。现场连续记录了天气变量。我们使用广义线性混合模型来分析天气变量和测量方法对不同飞行参数的影响。此外,我们还研究了在由三个轮毂高度(84、94 和 140 米;直径:112 米)定义的虚拟旋翼高度范围内飞行的概率。LRF 测得的飞行高度中值(52.5 米,95% CI:44.9-61.0,N = 2511)比 GPS 修正值(27.8 米,95% CI:24.7-31.2,N = 6792)平均高出 25 米。不同方法的飞行速度也存在差异(GPS:29.2 km/h,95% CI:28.2-30.3 km/h;LRF:25.1 km/h,95% CI:24.0-26.3 km/h)。天气变量的影响较弱。在潮湿(潮湿、多雨或多雾)天气中,鸟类的飞行次数和飞行高度往往低于干燥天气;在强风天气中,鸟类的飞行次数和飞行高度往往低于弱风天气。在虚拟旋翼高度范围内飞行的概率随着轮毂高度的降低而增加,因此离地间隙也随之降低。综合与应用:飞行行为变化很大。在整个飞行季节的所有天气条件下,全天都有不同高度的飞行。需要进一步研究飞行行为、天气变量、碰撞和其他因素之间的关系,以此为基础制定普遍适用于猛禽的停机制度。不同测量方法得出的平均飞行高度和速度是不同的。研究得出的任何数值都应根据测量方法进行解释。
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引用次数: 0
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Journal of Applied Ecology
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