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Weak reciprocal relationships between productivity and plant biodiversity in managed grasslands 管理下的草地生产力与植物生物多样性之间的互惠关系较弱
IF 5.3 1区 环境科学与生态学 Q1 ECOLOGY Pub Date : 2024-08-23 DOI: 10.1111/1365-2745.14400
Karl Andraczek, Laura E. Dee, Alexandra Weigelt, Judith Hinderling, Daniel Prati, Gaëtane Le Provost, Peter Manning, Christian Wirth, Fons van der Plas

在管理草地的各项研究中,植物生物多样性与生产力之间的关系变化很大,部分原因是在单个时间点收集的观测数据中难以考虑混杂因素以及生物多样性与生产力之间的相互关系。要在这些挑战中确定因果效应,需要新的分析方法和重复观察,以确定效应的时间顺序。在一个生长季节内的多个时间点收集的数据虽然很少,但有助于区分生物多样性对生产力的影响,反之亦然。在这里,我们利用对 150 个管理草地进行的季节性草地调查,重复进行了两年的调查,并采用了生态学中相对较新的统计方法,旨在从观测数据中推断因果关系,从而加深对这一问题的理解。我们将我们的方法与生态学中常用的方法(即混合效应模型)以及仅使用生长季节中一个时间点的观测数据的分析方法进行了比较。我们发现,与我们的主要模型相比,混合模型高估了生物多样性对生产力的影响,高出两个标准误差。在生产力对生物多样性的影响方面,我们使用混合模型发现了负效应,这种负效应对生长季节内收集数据的时间非常敏感。相比之下,我们的主要模型没有发现任何影响证据。传统模型高估了生物多样性和生产力之间的影响,这可能是由于混杂变量造成的。综述。了解生物多样性与生产力之间的关系是生态学的一个焦点话题,但揭示它们之间的相互关系仍具有挑战性。我们展示了更高分辨率的纵向数据以及控制更多混杂变量的方法可用于解决相互关系。我们强调了未来的数据需求和方法,它们可以帮助我们解决生物多样性与生产力之间的关系,这对于调和生态学中长期存在的争论以及最终了解生物多样性和生态系统功能如何应对全球变化至关重要。
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引用次数: 0
Fine‐scale alpine plant community assembly: Relative roles of environmental sorting, dispersal processes and species interactions 精细尺度的高山植物群落组合:环境分选、扩散过程和物种相互作用的相对作用
IF 5.5 1区 环境科学与生态学 Q1 ECOLOGY Pub Date : 2024-08-22 DOI: 10.1111/1365-2745.14401
Norbert Helm, Kryštof Chytrý, Karl Hülber, Dietmar Moser, Johannes Wessely, Andreas Gattringer, Johannes Hausharter, Harald Pauli, Manuela Winkler, Patrick Saccone, Andrea Lamprecht, Martin Rutzinger, Andreas Mayr, Andreas Kollert, Stefan Dullinger
Besides environmental sorting, other processes like biotic interactions and dispersal limitation are vital for the assembly of plant communities in high mountains and their re‐assembly under changing climatic conditions. Nevertheless, studies that compare the impact of these factors on plant community assembly above the tree line are largely lacking so far. We analysed occurrence changes in vascular plant communities of 492 permanent 1‐m2 plots in the alpine‐nival ecotone of Mt. Schrankogel, Austrian Alps by comparing resurvey data from 2014 with data from the initial survey in 1994. We combined these data with species inventories from 899 additional plots sampled in 2021 and 2022 across a larger landscape above the tree line covering an elevational range of 1700 m, which we used for fine‐scale habitat suitability modelling. We assessed the relative effects of projected habitat suitability, propagule pressure from surrounding populations and biomass density of neighbours on 1532 colonization and 372 extirpation events of 31 species observed on the permanent plots. We found that all three factors are significantly related to both colonisations and extirpations, with habitat suitability having the strongest, propagule pressure a slightly weaker, and vegetation density the weakest effect. Colonisations can be better explained by the three process proxies than extirpations. Our results indicate a crucial role of dispersal limitation besides the predominant effect of environmental filtering on the (re‐)assembly of the alpine‐nival plant community, while competitive/facilitative effects between plants tend to play a minor role. The strong imprint of nearby source plant populations on colonization/extirpation events suggests that recent plant migrations predominantly occur in small steps. This implies that while the topographically complex alpine terrain offers climatic microrefugia for plants, it may also pose potential barriers, hindering species from following their suitable climatic niches upwards. Synthesis: Besides filtering by environmental conditions dispersal limitation had a strong effect on the observed changes in a local alpine plant community over two decades. Limited dispersal capacities of plant species may counteract the ability of isolated cold areas to effectively shelter high alpine plants from the effects of climate warming.
除了环境分选之外,生物相互作用和扩散限制等其他过程对于高山植物群落的组合以及在不断变化的气候条件下的重新组合也至关重要。然而,迄今为止,比较这些因素对树线以上植物群落组合影响的研究还很缺乏。我们通过比较 2014 年的重新调查数据和 1994 年的首次调查数据,分析了奥地利阿尔卑斯山施兰科格尔山 492 块 1 平方米永久性地块上维管植物群落的发生变化。我们将这些数据与 2021 年和 2022 年在树线以上海拔 1700 米范围内采样的 899 个额外地块的物种清单相结合,用于建立精细尺度的栖息地适宜性模型。我们评估了预计的栖息地适宜性、周围种群的繁殖压力和邻居的生物量密度对永久性地块上观察到的 31 个物种的 1532 次定植和 372 次灭绝事件的相对影响。我们发现,所有这三个因素都与定殖和灭绝有明显关系,其中栖息地适宜性的影响最大,传播压力的影响稍弱,而植被密度的影响最弱。与灭绝相比,三个过程代用指标能更好地解释定殖。我们的研究结果表明,除了环境过滤对高山-新生植物群落(重新)组合的主要影响外,扩散限制也起着至关重要的作用,而植物之间的竞争/促进作用往往起着次要作用。附近的源植物种群对定植/外植事件的强烈影响表明,近期的植物迁移主要是以小步快跑的方式进行的。这意味着,地形复杂的高山地形在为植物提供气候微型庇护所的同时,也可能构成潜在的障碍,阻碍物种沿着其合适的气候壁龛向上迁移。综述:二十年来,除了环境条件的过滤作用外,扩散限制对观察到的当地高山植物群落的变化也有很大影响。植物物种有限的扩散能力可能会抵消孤立寒冷地区有效保护高山植物免受气候变暖影响的能力。
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引用次数: 0
Interventions for resilient nature-based solutions: An ecological perspective 基于自然的弹性解决方案干预措施:生态学视角
IF 5.3 1区 环境科学与生态学 Q1 ECOLOGY Pub Date : 2024-08-19 DOI: 10.1111/1365-2745.14377
Rachel J. Standish, Tina Parkhurst

1 引言 基于自然的解决方案(NbS)是应对社会挑战、气候变化、生物多样性丧失和可持续发展的行动,旨在保护和恢复本地生态系统,为生物多样性和人类带来益处(Cohen-Shacham 等人,2019 年;世界自然保护联盟,2020 年)。NbS 标准源于生态系统管理综合方法的基本原则,包括生物多样性保护、人类福祉和经济(《生物多样性公约》,2004 年)。它建立在大量关于自然对支持人类福祉的生态系统服务所作贡献的文献基础之上(Costanza 等人,1997 年;Westman,1977 年)。NbS 起源于欧洲,但在全球范围内正日益受到重视(Keesstra 等人,2018 年;Maes & Jacobs,2017 年;Novick 等人,2024 年;White 等人,2021 年;Zhu 等人,2023 年)。在城市景观中,它们通常被用于适应气候变化(Frantzeskaki 等人,2019 年;Zhu 等人,2023 年),但在农业和森林景观中,它们也被用于保护生物多样性及其他益处(Molloy 等人,2024 年)。这一点在适应全球气候变化的背景下尤为明显(Key 等人,2022 年;Turner 等人,2022 年),但也与减轻导致生物多样性丧失和影响人类福祉的其他压力因素有关。在此,我们回顾了 NbS 文献中如何对复原力进行概念化。然后,我们参考了更广泛的植物生态学文献,以确定经过实证检验的生态理论可为建立和管理具有恢复力的 NbS 提供信息的差异和差距。我们的目的是提供一个全新的视角(参阅 Sayer,2018 年),并提出针对恢复力机制(即支撑恢复力的生态因素;参阅 Oliver 等人,2015 年)的干预建议。
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引用次数: 0
Leaf functional traits predict timing of nutrient resorption and carbon depletion in deciduous subarctic plants 叶片功能特性可预测亚北极落叶植物的养分吸收和碳耗尽时间
IF 5.3 1区 环境科学与生态学 Q1 ECOLOGY Pub Date : 2024-08-14 DOI: 10.1111/1365-2745.14388
Yu-Kun Hu, Michelle Schollert, Rien Aerts, Richard S. P. van Logtestijn, James T. Weedon, Johannes H. C. Cornelissen

利益冲突声明作者声明他们没有利益冲突。Johannes H. C. Cornelissen 是《生态学杂志》的副主编,但没有参与本文的同行评审和决策过程。
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引用次数: 0
Genetic diversity matters for restoration of a threatened saltmarsh plant in harsh environments 遗传多样性对在恶劣环境中恢复一种濒危盐碱地植物至关重要
IF 5.3 1区 环境科学与生态学 Q1 ECOLOGY Pub Date : 2024-08-12 DOI: 10.1111/1365-2745.14384
Qun Zhang, Shiyun Qiu, Xincheng Li, Xiao Xu, Yi Zhu, Xinhong Cui, Qiang He, Bo Li

虽然遗传多样性被认为能提高退化植物种群的恢复成功率,但之前研究其对恢复结果的影响的结果却不尽相同。我们假设,遗传多样性对恢复目标植物表现的重要性会随着环境压力的增加而增加,并随着与不同植物连续生命阶段相关的特定植物性状的变化而变化。为了验证这一假设,我们进行了一项全因子普通花园实验,在低氮和高氮条件下,交叉研究盐度和遗传多样性对长江口濒危特有盐碱地植物芒柄蕨的生长和繁殖的影响。遗传多样性对不同胁迫梯度和指标的影响各不相同。在高胁迫(高盐度、低养分)条件下,更高的多样性会增强克隆生长和种子生产等生殖性状,但在低胁迫条件下则不会。植物生长性状在任何胁迫下都没有表现出多样性效应。综述:我们的研究结果强调了在生态恢复中考虑种内遗传多样性的重要性,并有助于解释多样性的环境依赖效应。
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引用次数: 0
Mangrove ecology guiding the use of mangroves as nature-based solutions 红树林生态学指导利用红树林作为基于自然的解决方案
IF 5.3 1区 环境科学与生态学 Q1 ECOLOGY Pub Date : 2024-08-07 DOI: 10.1111/1365-2745.14383
Catherine E. Lovelock, Vicki Bennion, Mayara de Oliveira, Valerie Hagger, Jack W. Hill, Valerie Kwan, Alex L. Pearse, Renee A. Rossini, Alice J. Twomey

红树林作为栖息地和资源支持鱼类、渔业和其他动物的重要性(Mumby 等人,2004 年;Nagelkerken 等人,2008 年;Rog 等人,2017 年;Sievers 等人,2019 年)、红树林在空间和时间上的分散性(Van der Stocken 等人,2019 年)以及对气候变化的脆弱性(Alongi,2008 年;Lovelock 等人,2015 年;Saintilan 等人,2020 年;Ward 等人,2016 年)、20 世纪中后期,红树林被改建成水产养殖池塘(Richards &amp; Friess, 2016; Valiela 等人,2001 年),红树林被大量开发,这表明红树林在提供一系列生态系统功能和服务方面发挥着重要作用--当这些服务随着红树林的消失而消失时,这一趋势就凸显出来了(Hochard 等人,2019 年;Narayan 等人,2016 年;Richards 等人,2020 年)。因此,最近的出版物将大部分红树林生态研究纳入生态系统服务范式(Balke 等人,2023 年),包括渔业生产(Zu Ermgassen 等人,2020 年)、气候调节(Alongi,2014 年;Lovelock &amp; Duarte,2019 年;Rovai 等人,2018 年)和海岸保护(Menéndez 等人,2020 年)。海岸保护生态研究对工程概念的影响越来越大(Van Hespen 等人,2023 年)。此外,社会生态过程的重要性已在生态文献中出现并成为主流(与过去的殖民主义做法相比),为实现有效、公正和可持续的红树林管理提供了方法,包括将其部署为 NbS(如 Dahdouh-Guebas 等人,2022 年;Dencer-Brown 等人,2022 年;Huxham 等人,2023 年)。
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引用次数: 0
Scale dependence and mechanisms of grazing-induced biodiversity changes depend on herbivore type in semiarid grasslands 放牧引起生物多样性变化的规模依赖性和机制取决于半干旱草原的食草动物类型
IF 5.3 1区 环境科学与生态学 Q1 ECOLOGY Pub Date : 2024-08-05 DOI: 10.1111/1365-2745.14385
Hui Yan, Yanlong Li, Wenhuai Li, Yang Yang, Shuxia Zheng, Frank Yonghong Li

草地上生活着各种食草动物,它们对当地和区域范围内的生物多样性和生态系统功能有着深远的影响。了解不同食草动物如何在多个尺度上影响植物多样性,对于有效保护生物多样性至关重要。然而,大多数研究都集中于放牧强度对植物多样性的影响,而忽视了不同食草动物在不同尺度上的影响和相关机制。基于在内蒙古典型草原的 16 个地块进行的为期 7 年的放牧实验,我们比较了不同食草动物(牛、绵羊和山羊)在中等放牧强度下对植物多样性的影响。我们使用物种-面积关系(SAR)和线性混合模型分析了物种丰富度在多个尺度(1、16、32、64、128、256、512 和 1024 平方米)上的变化。为了解 SAR 坡度变化,我们研究了四种潜在机制:总体物种丰富度、个体总数、物种丰度分布和物种聚集。我们发现,放牧对植物多样性产生了规模效应,表现为 SAR 坡度的显著下降。斜率的下降表明,放牧的负面影响在更大尺度上更为明显。此外,不同食草动物对植物多样性的规模效应也各不相同。在小尺度(1 平方米)和大尺度(1024 平方米)上,牛比绵羊和山羊对多样性的正面影响更大。相反,在大尺度(1024 平方米)上,绵羊和山羊比对照组对多样性的负面影响更大。SAR 斜率的下降主要是由于总体物种丰富度和物种丰度分布的变化造成的。这主要是因为牛对优势物种的影响更大,而绵羊和山羊对稀有物种的影响更大。综述:我们的研究结果表明,即使在相同的放牧强度下,放牧对物种多样性的影响也会随着研究规模、食草动物类型以及它们之间的相互作用而变化。这一发现对保护草地生物多样性具有重要意义,因为放牧通常比四方形研究的规模更大,而且涉及各种对植物多样性有不同影响的食草动物。
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引用次数: 0
Plant and microbial feedbacks maintain soil nitrogen legacies in burned and unburned grasslands 植物和微生物的反馈作用维持着烧毁和未烧毁草地中的土壤氮遗留物
IF 5.3 1区 环境科学与生态学 Q1 ECOLOGY Pub Date : 2024-08-05 DOI: 10.1111/1365-2745.14386
Matthew A. Nieland, Lydia H. Zeglin

氮(N)的可用性是生态系统结构和功能的一个众所周知的驱动因素,但随着空气质量法规不断减少大气中氮的沉积,有必要了解有管理和无管理的生态系统如何应对陆地氮可用性的普遍下降。由于植物和微生物的反馈作用发生了改变,历史上因污染或施肥造成的氮富营养化可能会继续制约当代对可用氮减少的反应。因此,虽然某些管理措施(如规定用火)会从草原生态系统中去除氮,但火能为从长期氮输入中恢复的生态系统起到什么作用还不得而知。为了填补这一知识空白,我们在一个高草草原生态系统的野外实验中停止了为期 30 年的氮肥处理,并将焚烧和火抑制(未焚烧)处理交叉进行。我们在每个先前施肥的恢复地块内建立了子地块,以相同的历史施肥量(10 克 N m-2 year-1 作为 NH4NO3)施肥,以比较恢复地块与不同火烧制度下的对照(从未施肥)和仍施肥处理的植物和土壤特性。我们记录了从氮肥中恢复的烧毁草原和未烧毁草原生态系统特性中不同的氮肥遗留物。在烧毁和未烧毁的草原上,恢复地块的土壤氮可用性、硝化和反硝化潜力在 3-5 年内仍高于对照地块,这表明烧毁和未烧毁的草原上都存在积极的遗留物,但烧毁并没有减少这种遗留物。然而,在焚烧过的草原上,地上植物产量的积极影响依然存在,因为一种产量更高的草种(开关草)取代了之前的优势草种(大蓝茎桉),尽管根部 C:N 增加了,但土壤 C:N 没有增加,而是回到了对照组的水平。因此,焚烧草原和未焚烧草原的主要氮损失途径(分别是热卷化和微生物介导过程)在 5 年内导致的土壤总氮损失(20-28 克氮 m-2)相似。综述:我们的研究结果表明,氮的富营养化会诱发生态系统功能的正向遗留效应,这种效应可持续至少 50 年。氮引起的后遗症产生的原因是土壤微生物氮循环和植物功能特性的变化。因此,由于植物和微生物的反馈作用不同,不同的管理方法可能会在总氮和可用土壤氮方面引起相似的生态系统恢复轨迹。
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引用次数: 0
Plant height bridges hierarchical community responses to nitrogen enrichment 植物高度为群落对氮富集的分级响应架起了桥梁
IF 5.3 1区 环境科学与生态学 Q1 ECOLOGY Pub Date : 2024-08-05 DOI: 10.1111/1365-2745.14381
Jiaqiang Liao, Quan Quan, Fangfang Ma, Jinlong Peng, Shuli Niu

氮富集通过改变不同层次的群落过程来影响生态系统的生产力,这些过程包括单个物种性状的反应、物种重新排序以及最终的物种更替。以前的大多数研究都侧重于分别研究这些过程的反应,但很少有人研究群落的分级反应是如何相互联系并促成生产力的变化的。为了填补这一知识空白,我们进行了一项为期 4 年的氮添加野外实验,以研究高山草甸生态系统中地上净初级生产力(ANPP)的群落分级响应。我们发现,在 4 年的实验中,单个物种的反应对氮添加下的净初级生产力变化贡献更大,而物种重排和物种更替的贡献很小。其中,植株高度是最终解释和弥合不同群落水平上氮素添加对ANPP影响的关键性状。氮添加促进了植株高度和单个物种的生长,并通过增加较高的禾本科植物和莎草,减少较矮的草本植物和豆科植物,对功能群进行了重新排序。物种更替对 ANPP 变化的影响较弱,这是因为失去和增加的物种生物量都较低。最后,较高的宿根植物在增加氮素后对ANPP的促进作用更大。综述。这项研究提供了一个新的视角,说明生态系统生产力如何以与植物高度相关的分层方式对氮素富集做出响应,这有助于阐明复杂的群落过程,并建立植物性状与生态系统功能之间的直接联系。
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引用次数: 0
Drought effects in Mediterranean forests are not alleviated by diversity-driven water source partitioning 多样性驱动的水源分区无法缓解地中海森林的干旱影响
IF 5.3 1区 环境科学与生态学 Q1 ECOLOGY Pub Date : 2024-08-05 DOI: 10.1111/1365-2745.14387
Eugénie Mas, Alberto Vilagrosa, Luna Morcillo, Matthias Saurer, Fernando Valladares, Charlotte Grossiord

森林生态系统中的树种多样性可以通过改善小气候和地下水源分配来降低其对极端干旱的脆弱性。然而,人们对地下水吸收的季节性动态知之甚少,而这种动态决定了多样性对树木碳同化和水交换的影响是积极的还是消极的。我们在树种多样性不断增加(从单一树种到四种树种混交)的地中海森林中建立了一个由 30 个永久性地块组成的网络,利用水力和稳定同位素方法,对四种松树和橡树树种的 265 棵树在两年内的原位地上碳和水关系以及地下水源的季节性模式进行了研究。我们发现,阔叶树和针叶树混交中物种多样性的增加导致了橡树和松树物种之间强烈的土壤水源分配。随着混交林中夏季条件变得更加干燥,橡树从更深的土壤中吸收水分,而松树则系统地局限于浅层土壤。尽管地下水源分配很重要,但与单一树种相比,松树在混交林中的光合作用、气孔导度和叶片水势在干旱诱导下仍有较强的下降,而橡树则有一些益处。综述:我们的研究结果表明,树种多样性促进了橡树和松树混交林中地下水源的分配,从而有可能减少更多样化生态系统中对水的竞争。然而,我们的研究结果表明,树种多样性不足以缓冲严重干旱对地上树碳和水利用的不利影响,从而导致更高的水压力,尤其是对松树而言。
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引用次数: 0
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Journal of Ecology
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