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Carcass decay inhibits denitrification indirectly by regulating the microbiota and physicochemical properties in a model water system 胴体腐烂通过调节模型水系统中的微生物群和物理化学特性间接抑制反硝化作用
IF 5 1区 环境科学与生态学 Q1 BIODIVERSITY CONSERVATION Pub Date : 2024-08-02 DOI: 10.1111/1365-2664.14748
Jiawei Yang, Qiaoling Yu, Wanghong Su, Sijie Wang, Xiaochen Wang, Qian Han, Huan Li

动物尸体分解参与了水生生态系统的氮(N)循环,如反硝化、挥发和沥滤。反硝化过程是氮循环的重要组成部分,有助于减轻硝酸盐积累造成的生物毒性。然而,尸体腐烂是否以及如何影响河水中的反硝化物及其活性仍是一个未知数。本研究采用高通量测序、实时定量 PCR 和反硝化酶活性(DEA)分析方法,在尸体腐烂造成氮污染的模型水系中研究了六种反硝化细菌(分别编码 napA、narG、nirK、nirS、norB 和 nosZ)及其反硝化活性。尸体腐烂增加了反硝化微生物群的数量并改变了其组成。距离矩阵的多元回归显示,尸体腐烂对反硝化群落的影响明显大于温度。出乎我们意料的是,在受尸体污染的水体中,反硝化微生物群落减少了。多元回归模型显示,反硝化类群的丰度和基因拷贝可共同预测 DEA 的变化,其中 norB 型 Hydrogenophaga 的贡献最大。此外,偏最小二乘路径模型(PLS-PM)显示,尸体腐烂通过反硝化群落和水的理化性质间接抑制了 DEA。综述与应用。本研究为了解尸体腐烂如何降低水系统中的反硝化活性提供了重要见解。这些发现有助于我们科学地管理和修复受污染的水体。
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引用次数: 0
Shared use of a mass-flowering crop drives dietary niche overlap between managed honeybees and bumblebees 共同使用一种大量开花的作物会导致管理下的蜜蜂和熊蜂的食性生态位重叠
IF 5 1区 环境科学与生态学 Q1 BIODIVERSITY CONSERVATION Pub Date : 2024-08-01 DOI: 10.1111/1365-2664.14743
Olivia Bernhardsson, Liam Kendall, Ola Olsson, Peter Olsson, Henrik G. Smith

野生授粉昆虫与人工饲养蜜蜂(Apis mellifera)之间的资源竞争有可能对昆虫生物多样性以及野生植物和作物授粉产生不利影响。由于蜜蜂是中心地带的觅食者,它们对野生蜜蜂的竞争影响预计将由蜂巢的远近以及与景观资源可用性相关的觅食决策所决定。然而,这些因素如何构建野生蜜蜂与管理蜜蜂之间的食物生态位重叠仍不清楚。我们在半自然草地上进行了一项野外实验,在大量开花的油菜(Brassica napus)花期期间和花期之后,测量了蜜蜂觅食密度以及与水尾熊蜂(Bombus terrestris)的食性重叠情况。我们通过标准化的横断面调查测量了蜜蜂的觅食密度,并从两种蜜蜂采集的花粉样本中量化了蜜蜂的食性组成和食性生态位重叠情况。蜜蜂的觅食密度在养蜂场附近最高,在距离养蜂场 500 米以外则急剧下降。然而,生态位重叠与蜂巢的远近无关,但与油菜的供应量呈正相关。此外,在整个季节中,花粉食物组成和广度在种间和种内存在显著差异。综述与应用:蜜蜂和熊蜂在农业环境中的利基重叠是由于大量开花的油菜资源共享造成的。当蜜蜂和熊蜂主要在野生植物上觅食时,它们会保持不同的花粉食性,这表明这些通食类群之间的资源竞争风险很低。在农业景观中促进花卉资源可用性和多样性的保护措施对于维持管理蜜蜂和野生蜜蜂之间的生态位分化至关重要。
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引用次数: 0
Evidence for seasonal compensation of hunting mortalities in a long-lived migratory bird 一种长寿候鸟猎杀死亡的季节性补偿证据
IF 5 1区 环境科学与生态学 Q1 BIODIVERSITY CONSERVATION Pub Date : 2024-08-01 DOI: 10.1111/1365-2664.14731
Frédéric LeTourneux, Gilles Gauthier, Roger Pradel, Josée Lefebvre, Pierre Legagneux

了解狩猎死亡率是其他死亡率的叠加还是补偿,是管理收获种群的核心。长寿物种预计会表现出狩猎死亡率与其他死亡来源的叠加效应,使其成为通过运动捕猎进行种群管理的理想候选物种。以前对这些过程的研究主要集中在依赖密度的自然死亡率对狩猎死亡率的补偿上,但当收获发生在一年中不同的时期时,个体之间狩猎脆弱性的异质性也可能导致这些时期之间的补偿性死亡率。我们以大雪鹅(Anser caerulescens atlantica)为例探讨了这一新观点,大雪鹅是一种被捕猎的物种,其种群在 20 世纪末变得过剩。为了控制这一种群数量,野生动物保护机构采取了前所未有的行动,放宽了狩猎规定,如加拿大在1999年春季和美国在2009年冬季分别实施了特别狩猎季。为了确定每种措施对存活率的相对影响,我们利用 30 年的捕获-标记-计数器数据,在活体和死亡-相遇多事件联合模型中按季节估算了成年大雁的存活率。我们还利用这种准实验设置来评估季节间狩猎死亡率的可能补偿。我们发现,这两个特殊狩猎季节都降低了鹅在实施季节和时期的存活率。然而,2009 年美国设立冬季特别狩猎季后,春季狩猎季的存活率有所提高。每年春季和冬季的死亡率呈负相关,这表明冬季狩猎死亡率的增加在2009年后被春季死亡率的降低所补偿。综述与应用:据我们所知,我们首次报道了一个季节的狩猎死亡率被随后一个季节狩猎死亡率的降低所补偿的实例。我们认为,个体间捕猎脆弱性的异质性(可能与幼体的存在有关)可以解释这种现象。为了更好地了解种群动态和管理被捕猎种群,我们需要更好地了解季节性模式和死亡率各组成部分之间的关系。
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引用次数: 0
Density dependence only affects increase rates in baleen whale populations at high abundance levels 密度依赖性只在高丰度水平上影响须鲸种群的增长率
IF 5 1区 环境科学与生态学 Q1 BIODIVERSITY CONSERVATION Pub Date : 2024-07-30 DOI: 10.1111/1365-2664.14744
Yu Kanaji, Rob Williams, Alexandre N. Zerbini, Trevor A. Branch

工业捕鲸结束后,大多数须鲸种群数量都在增加,但它们的恢复模式对长期以来有关密度依赖性的假设提出了挑战。长期以来,人们一直认为种群增长率会随着恢复而下降,直到达到平衡("承载能力",K)。事实上,国际捕鲸委员会假定,在达到 K 之前,增长率就会放缓,在 0.6K 时达到最大生产力。这个 0.6K 的种群水平被用作国际基准,是捕鲸法规和决定是否宣布须鲸种群枯竭的基础。我们对从低丰度到高丰度范围内具有多个丰度估计值的四个须鲸长期数据集进行了模型拟合,发现有力的证据表明,在广泛的丰度水平范围内,增加率保持在接近最大水平,只有当种群接近 K 时才会下降。与目前假设的 0.6K 相比,这些值的总体平均值(0.8K)将是更合理的默认选择。综合与应用。估计的恢复率意味着,目前使用的管理阈值低于实际的最大生产力,即使在高丰度时,种群也能迅速增加。然而,如果种群模型继续假定最大生产力为 0.6K,那么相对于 K 的丰度估计值将低于实际值,从而提供保守的评估结果。我们的研究结果应能激发人们进一步讨论最大持续产量作为渔业和野生动物管理基本概念的作用。
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引用次数: 0
Close to the edge: Spatial variation in plant diversity, biomass and floral resources in conventional and agri-environment cereal fields 接近边缘传统和农业环境谷物田中植物多样性、生物量和花卉资源的空间变化
IF 5 1区 环境科学与生态学 Q1 BIODIVERSITY CONSERVATION Pub Date : 2024-07-29 DOI: 10.1111/1365-2664.14737
Laura M. E. Sutcliffe, Jenny Schellenberg, Stefan Meyer, Christoph Leuschner

人们通常把耕地系统中的非作物(segetal)植物简单地视为 "杂草",即最坏的情况下是有害的,最好的情况下是不受欢迎的。随着欧洲耕地系统管理强度的增加,除了最耐受干扰的植物物种外,其他所有植物物种的数量都大幅减少,对整个农业食物网产生了负面影响。近年来,人们努力通过花带和无喷洒田边等措施来促进农业生物多样性。然而,有关这些措施对耕地植物区系影响的研究很少考虑它们在作物田内的空间变化。我们调查了德国六个地区传统谷物田和农业环境谷物田中维管植物物种丰富度的空间分布及其通过生物量和花卉单位对食物网的贡献。我们研究了两种田间措施(不施农药或化肥的大面积谷物田、有或没有间作开花物种的谷物田)和一种邻近措施(邻近花带),从田地边缘到内部每隔 1 米记录一次。然后对这些结果进行推断,以说明这些措施对田间资源供应的影响。在常规处理中,无论邻近生境如何,物种丰富度和植物生物量在第一米后都急剧下降。而 "广泛 "处理则在田间内部保持了更高水平的多样性和资源供给。在田间层面,这意味着常规管理(1900 个花朵单位/公顷)与农业环境措施(127,000 个花朵单位/公顷)之间的开花资源供应量相差 60 多倍。综述与应用。我们在常规种植中发现的强烈边缘效应支持了缩小田块面积可在促进作物内生物多样性方面发挥作用的前提。然而,在保持高产的同时,将广阔的田间边缘作为 AEM 将更有效地最大限度地提高普通植物的多样性。
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引用次数: 0
Integrated policymaking is needed to deliver climate and ecological benefits from solar farms 需要综合决策来实现太阳能发电场的气候和生态效益
IF 5.7 1区 环境科学与生态学 Q1 BIODIVERSITY CONSERVATION Pub Date : 2024-07-29 DOI: 10.1111/1365-2664.14745
Fabio Carvalho, Hing Kin Lee, Hollie Blaydes, Lucy Treasure, Laura J. Harrison, Hannah Montag, Kristina Vucic, Jonathan Scurlock, Piran C. L. White, Stuart P. Sharp, Tom Clarkson, Alona Armstrong
Multi‐purpose land use is of great importance for sustainable development, particularly in the context of increasing pressures on land to provide ecosystem services (e.g. food, energy) and support biodiversity. The recent global increase in land‐take for utility‐scale ground‐mounted solar farms (hereafter referred to as solar farms) to meet Net Zero targets presents an opportunity for enhanced delivery of ecosystem services, especially in temperate ecosystems where solar farm development often results in land use change away from comparatively intensive agricultural land management. Solar farms have long operational lifespans, experience low levels of disturbance during operation and can be managed for ecosystem services beyond low‐carbon electricity generation, including food production and biodiversity conservation. Here, we briefly synthesise the mechanisms by which solar farm development and operation may impact natural capital and ecosystem services, and provide policy recommendations for policymakers and the solar farm sector. Solar farms can deliver environmental benefits for hosting ecosystems while minimising negative impacts, with outcomes depending on location, construction techniques, and land management practices. However, the historical misalignment between climate, nature, and land use policies has hindered efforts to simultaneously address the climate and biodiversity crises through land use change for solar farms. For instance, existing public financial incentives in the UK that encourage landowners and developers to manage land for biodiversity largely exclude land with solar farms. Policy implications: We call for public policymakers to identify appropriate opportunities to amend existing national laws that address climate and biodiversity separately to improve integration of multiple aspects of the climate‐nature‐land use nexus into policymaking by: (1) formulating ecological and socio‐economic indicators and metrics that are appropriate to underpin the development, implementation, and assessment of public policies; (2) adopting a cross‐sectoral and cross‐government approach to form public policies; (3) ensuring solar farms can access public financial incentives that encourage sustainable land use; (4) implementing land use policies that incentivise funding from non‐government sources (e.g. private sector) into nascent nature markets; (5) embedding solar farms in biodiversity‐inclusive spatial planning policies and decision‐making; and (6) building equity and clarity into responsibilities and benefits for all actors involved.
多用途土地利用对可持续发展非常重要,特别是在土地提供生态系统服务(如粮食、能源)和支持生物多样性的压力日益增加的情况下。最近,为实现净零排放目标,全球公用事业规模的地面太阳能发电场(以下简称太阳能发电场)占用的土地不断增加,这为加强生态系统服务的提供提供了机遇,尤其是在温带生态系统中,太阳能发电场的开发往往会导致土地用途的改变,而不再是相对集约的农业用地管理。太阳能发电场的运行寿命长,运行期间的干扰程度低,除了低碳发电外,还可对生态系统服务进行管理,包括粮食生产和生物多样性保护。在此,我们简要综述了太阳能发电场的开发和运营可能影响自然资本和生态系统服务的机制,并为政策制定者和太阳能发电场部门提供了政策建议。太阳能发电场可为所在生态系统带来环境效益,同时将负面影响降至最低,其结果取决于地点、建造技术和土地管理实践。然而,气候、自然和土地使用政策之间的历史错位阻碍了通过改变太阳能发电场的土地使用来同时解决气候和生物多样性危机的努力。例如,英国现有的公共财政激励措施鼓励土地所有者和开发商对土地进行生物多样性管理,但在很大程度上并不包括太阳能发电场所在的土地。政策影响:我们呼吁公共政策制定者寻找适当的机会,修订分别处理气候和生物多样性问题的现有国家法律,通过以下方式将气候-自然-土地利用关系的多个方面更好地纳入政策制定中:(1) 制定生态和社会经济指标及衡量标准,以支持公共政策的制定、实施和评估;(2) 采用跨部门和跨政府的方法制定公共政策;(3) 确保太阳能农场能够获得鼓励可持续土地利用的公共财政激励措施;(4) 实施土地利用政策,激励非政府来源(如私营部门)的资金投入到新生的土地利用项目中。(5) 将太阳能发电场纳入生物多样性包容的空间规划政策和决策中;以及 (6) 为所有参与者建立公平和明确的责任和利益。
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引用次数: 0
Using artificial neural networks and citizen science data to assess jellyfish presence along coastal areas 利用人工神经网络和公民科学数据评估沿海地区的水母存在情况
IF 5 1区 环境科学与生态学 Q1 BIODIVERSITY CONSERVATION Pub Date : 2024-07-24 DOI: 10.1111/1365-2664.14734
J. Castro-Gutiérrez, J. C. Gutiérrez-Estrada, J. C. Báez

沿海地区的水母潮会给海滩使用者和地方当局带来巨大挑战。了解影响水母出现的因素对于制定有效的管理和缓解策略至关重要。本研究利用安达卢西亚海岸(40 个不同地区的 232 个海滩)的公民科学数据和机器学习技术,研究是否可以预测沿海地区是否存在水母。采用多层感知器(MLP)神经网络对用户关于水母存在与否的评论进行分类,准确率约为 96%。MLP 模型在处理非线性分类问题和噪声方面表现出很强的鲁棒性,但在预测水母是否存在方面精度较低,这可能是由于数据集的不平衡造成的。研究还纳入了环境数据,以确定海面温度、风向和风速对水母分布的影响。结果与之前的研究一致,表明这些环境因素对水母的出现有显著影响。综述与应用。这项研究为海滩管理提供了可行的建议。对海面温度和风力条件进行连续监测,将能更准确地预测水母的分布。动态响应环境数据的适应性管理策略将有助于减轻水母水华对沿海旅游业和公众健康的影响。
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引用次数: 0
Using net anthropogenic nutrient inputs at fine spatial scales benefits decision-making in watersheds to protect water quality 在精细空间尺度上利用人为净营养投入有利于流域决策,保护水质
IF 5 1区 环境科学与生态学 Q1 BIODIVERSITY CONSERVATION Pub Date : 2024-07-24 DOI: 10.1111/1365-2664.14733
Stéphanie Shousha, Roxane Maranger

人类在陆地上的各种活动给内陆和沿海水域带来了过多的营养负荷,导致水质因文化富营养化而恶化。准确识别和量化陆地上的主要氮源和磷源,对于实施适当的干预策略以减少负荷,从而长期保护水质至关重要。人类活动产生的氮磷净输入量(NANI/NAPI)质量平衡法已成功用于量化陆地上为维持人类活动而增加的营养物质,并预测向水中输出的部分。然而,用于生成质量平衡的丰富详细信息通常会合并并放大到整个流域,从而平均掉陆地上高度异质的模式,而这正是识别向受纳水体排放过多营养物质的区域的关键。在此,我们介绍了加拿大魁北克省圣劳伦斯盆地八个集水区的更精细尺度(流域、县和市)的 NANI 和 NAPI,并比较了两个不同年代(1981 年和 2021 年)的输入变化。2021 年,流域尺度上的 NANI 从 828 千克/平方公里到 6602 千克/平方公里不等,而市级尺度上的范围更大,从接近 0 到 27,413 千克/平方公里不等,这凸显了使用市级尺度来精确定位高输入特定区域的重要性。然后,我们展示了如何通过划分 NANI 的各个组成部分(NAPI 也可采用同样的方法)来揭示城市化、作物密集型或畜牧密集型农业中的主要投入类型,从而帮助决策者根据主要投入类型选择最有效的干预策略。最后,我们将讨论如何进一步利用长期积累的信息来加深对减缓战略的理解。政策影响。在尽可能小的尺度上使用 NANI 和 NAPI 的详细组成部分可提供相关的定量信息,并作为科学家和决策者之间的有效沟通工具。我们建议,使用这种方法可以更好地根据科学证据制定有针对性的营养物质减排战略,以保护水质。
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引用次数: 0
Agricultural specialisation increases the vulnerability of pollination services for smallholder farmers 农业专业化增加了小农授粉服务的脆弱性
IF 5 1区 环境科学与生态学 Q1 BIODIVERSITY CONSERVATION Pub Date : 2024-07-24 DOI: 10.1111/1365-2664.14732
T. P. Timberlake, A. R. Cirtwill, S. Sapkota, D. R. Bhusal, K. Devkota, R. Karki, D. Joshi, N. M. Saville, S. Kortsch, S. Baral, T. Roslin, J. Memmott

小农农场占全球农场总数的 84%,养活着 20 亿人。这些农场严重依赖生态系统服务,易受环境变化的影响,但在生态文献中的代表性不足。这些系统中作物的高度多样性使得确定和管理生态系统服务的最佳提供者(如满足多种作物需求的最佳授粉者)具有挑战性。此外,目前还不清楚生态系统服务需求是否会随着小农向更专业化的商业耕作过渡而发生变化--这种趋势在全球范围内日益明显。在此,我们提出了一种新的指标,用于预测在多样化多作物耕作系统中提供生态系统服务的物种。我们在尼泊尔农村的 10 个小农村落开展工作,利用这一指标来检验关键传粉昆虫以及支持它们的管理行动是否会因农民的农业优先事项(生产营养食物养家糊口与经济作物创收)而有所不同。我们还测试了授粉服务的复原力是否会随着农民对经济作物的专业化而发生变化。我们的研究表明,农民的农业优先事项可以决定他们所依赖的传粉昆虫群落。包括熊蜂、独居蜂和苍蝇在内的野生昆虫提供了支撑养分生产的大部分授粉服务,而创收则更依赖于单一物种--驯化蜜蜂。支持创收的传粉昆虫的多样性大大降低,使经济作物种植者更容易受到传粉昆虫减少的影响。无论农民的农业重点是什么,同样的野生植物物种(主要是草本杂草和灌木)对于支持作物传粉昆虫的花卉资源都很重要。推广这些野生植物可能会提高该地区所有农民的授粉服务。综述与应用。我们强调了当小农过渡到专业化经济作物耕作时授粉服务的脆弱性,并强调了作物、授粉者和野生植物多样性在降低这种风险方面的作用。我们介绍的方法可随时应用于全球其他小农环境,以帮助描述和管理支撑小农家庭生计和营养健康的生态系统服务。
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引用次数: 0
Salvage logging and subsequent post-windthrow management diminish forest bird communities for two decades 抢救性砍伐和随后的风灾后管理使森林鸟类群落减少了二十年
IF 5 1区 环境科学与生态学 Q1 BIODIVERSITY CONSERVATION Pub Date : 2024-07-23 DOI: 10.1111/1365-2664.14727
Michał Walesiak, Rosanne Michielsen, Grzegorz Mikusiński, Michał Żmihorski

众所周知,扰动后森林管理会损害生物多样性,包括鸟类群落,但大多数研究都集中在抢救性采伐的短期影响上,而没有认识到扰动后集体造林措施的累积性、持久性影响。我们跟踪了温带松林中受风干扰后 5 到 19 年间鸟类群落的演替情况,包括受风干扰地区和未受风干扰地区从缺口形成到早期树冠再生的时期,并将其与附近未受风干扰影响的生产林进行了比较。就鸟类的丰度和丰富度而言,未受管理的风刮地区的鸟类群落一直是最丰富的。在整个研究期间,它们所栖息的林鸟多样性与未受影响的生产林相当,而且农田鸟类的多样性也很丰富。有人管理的风场和无人管理的风场遵循两种截然不同的演替路径,并没有趋同。尽管随着树冠的再生,两种风障林中的鸟类群落逐渐与未受干扰森林中的鸟类群落相似,但每种类型的风障林和未受影响的生产林都保持着不同的群落,直到研究结束。综述与应用。限制任何积极的风刮后管理都会使鸟类演替走上一条独特的道路,从而形成独特而多样的鸟类群落。我们主张将自然干扰视为具有成本效益的生态系统恢复工具,前提是不实施积极的管理。此外,我们建议不要使用 "抢救性砍伐 "一词来指扰动后的集体造林措施,因为随着长期研究的增多,对该词的不同解释可能会导致越来越多的混淆。
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引用次数: 0
期刊
Journal of Applied Ecology
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