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Plant composition changes in a small-scale community have a large effect on the performance of an economically important grassland pest 小规模群落中植物成分的变化对一种具有重要经济意义的草原害虫的表现有很大影响
IF 2.2 2区 环境科学与生态学 Q1 Agricultural and Biological Sciences Pub Date : 2019-09-04 DOI: 10.1186/s12898-019-0248-6
X. Qin, Huihui Wu, Xunbing Huang, T. Lock, R. Kallenbach, Jingchuan Ma, Md. Panna Ali, X. Tu, G. Cao, Guangjun Wang, X. Nong, M. McNeill, Zehua Zhang
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引用次数: 1
Habitat requirements of the European brown hare (Lepus europaeus Pallas 1778) in an intensively used agriculture region (Lower Saxony, Germany) 集约化农业区(德国下萨克森州)欧洲褐兔(Lepus europaeus Pallas 1778)的生境要求
IF 2.2 2区 环境科学与生态学 Q1 Agricultural and Biological Sciences Pub Date : 2019-08-08 DOI: 10.1186/s12898-019-0247-7
Katharina Sliwinski, K. Ronnenberg, K. Jung, E. Strauss, U. Siebert
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引用次数: 25
The Hermans–Rasson test as a powerful alternative to the Rayleigh test for circular statistics in biology Hermans-Rasson测试是生物学循环统计的一个强有力的替代Rayleigh测试
IF 2.2 2区 环境科学与生态学 Q1 Agricultural and Biological Sciences Pub Date : 2019-08-07 DOI: 10.1186/s12898-019-0246-8
Lukas Landler, G. Ruxton, E. P. Malkemper
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引用次数: 63
No evidence of flowering synchronization upon floral volatiles for a short lived annual plant species: revisiting an appealing hypothesis 没有证据表明一个短命的一年生植物物种在花挥发物上开花同步:重新审视一个有吸引力的假设
IF 2.2 2区 环境科学与生态学 Q1 Agricultural and Biological Sciences Pub Date : 2019-08-07 DOI: 10.1186/s12898-019-0245-9
Ute Fricke, Dani Lucas‐Barbosa, J. Douma
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引用次数: 5
Explosive breeding in tropical anurans: environmental triggers, community composition and acoustic structure. 热带无尾类动物的爆炸性繁殖:环境触发因素、群落组成和声学结构
IF 2.2 2区 环境科学与生态学 Q1 Agricultural and Biological Sciences Pub Date : 2019-07-19 DOI: 10.1186/s12898-019-0243-y
Juan Sebastian Ulloa, Thierry Aubin, Diego Llusia, Élodie A Courtois, Antoine Fouquet, Philippe Gaucher, Sandrine Pavoine, Jérôme Sueur

Background: Anurans largely rely on acoustic communication for sexual selection and reproduction. While multiple studies have focused on the calling activity patterns of prolonged breeding assemblages, species that concentrate their reproduction in short-time windows, explosive breeders, are still largely unknown, probably because of their ephemeral nature. In tropical regions, multiple species of explosive breeders may simultaneously aggregate leading to massive, mixed and dynamic choruses. To understand the environmental triggers, the phenology and composition of these choruses, we collected acoustic and environmental data at five ponds in French Guiana during a rainy season, assessing acoustic communities before and during explosive breeding events.

Results: We detected in each pond two explosive breeding events, lasting between 24 and 70 h. The rainfall during the previous 48 h was the most important factor predicting the emergence of these events. During explosive breeding events, we identified a temporal factor that clearly distinguished pre- and mid-explosive communities. A common pool of explosive breeders co-occurred in most of the events, namely Chiasmocleis shudikarensis, Trachycephalus coriaceus and Ceratophrys cornuta. Nevertheless, the species composition was remarkably variable between ponds and for each pond between the first and the second events. The acoustic structure of explosive breeding communities had outlying levels of amplitude and unexpected low acoustic diversity, significantly lower than the communities preceding explosive breeding events.

Conclusions: Explosive breeding communities were tightly linked with specific rainfall patterns. With climate change increasing rainfall variability in tropical regions, such communities may experience significant shifts in their timing, distribution and composition. In structurally similar habitats, located in the same region without obvious barriers, our results highlight the variation in composition across explosive breeding events. The characteristic acoustic structure of explosive breeding events stands out from the circadian acoustic environment being easily detected at long distance, probably reflecting behavioural singularities and conveying heterospecific information announcing the availability of short-lived breeding sites. Our data provides a baseline against which future changes, possibly linked to climate change, can be measured, contributing to a better understanding on the causes, patterns and consequences of these unique assemblages.

背景:有尾目动物主要依靠声学通讯进行性选择和繁殖。虽然许多研究都集中于长期繁殖群体的叫声活动模式,但集中在短时间内繁殖的物种--爆发性繁殖者--在很大程度上仍不为人所知,这可能是因为它们的短暂性。在热带地区,多个物种的爆发性繁殖者可能会同时聚集在一起,形成大规模、混合和动态的合唱团。为了了解这些合唱的环境触发因素、物候和组成,我们在法属圭亚那的五个池塘收集了雨季期间的声学和环境数据,评估了爆炸性繁殖事件之前和期间的声学群落:结果:我们在每个池塘发现了两次爆发性繁殖事件,持续时间在 24 小时到 70 小时之间。在爆发性繁殖事件中,我们发现了一个时间因素,它能明显区分爆发前和爆发中的群落。在大多数情况下,爆炸性繁殖群落中都有一个共同的繁殖群落,即 Chiasmocleis shudikarensis、Trachycephalus coriaceus 和 Ceratophrys cornuta。然而,在第一次和第二次事件中,不同池塘之间以及每个池塘的物种组成都有显著差异。爆炸性繁殖群落的声学结构具有离谱的振幅水平和意想不到的低声学多样性,明显低于爆炸性繁殖事件之前的群落:爆炸性繁殖群落与特定的降雨模式密切相关。结论:爆发性繁殖群落与特定的降雨模式密切相关。随着气候变化增加热带地区的降雨变异性,这类群落的时间、分布和组成可能会发生重大变化。在结构相似、位于同一地区且无明显障碍的栖息地中,我们的研究结果突显了不同爆发性繁殖事件的组成差异。爆炸性繁殖事件的声学结构特征与昼夜节律声学环境截然不同,很容易被远距离探测到,这可能反映了行为的奇异性,并传递了宣布短命繁殖地可用性的异质性信息。我们的数据提供了一个基线,可以据此测量未来的变化(可能与气候变化有关),有助于更好地了解这些独特组合的原因、模式和后果。
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引用次数: 0
Modeling future wildlife habitat suitability: serious climate change impacts on the potential distribution of the Rock Ptarmigan Lagopus muta japonica in Japan's northern Alps. 模拟未来野生动物栖息地适宜性:严重气候变化对日本北阿尔卑斯岩雷鸟潜在分布的影响
IF 2.2 2区 环境科学与生态学 Q1 Agricultural and Biological Sciences Pub Date : 2019-07-10 DOI: 10.1186/s12898-019-0238-8
Masanobu Hotta, Ikutaro Tsuyama, Katsuhiro Nakao, Masaaki Ozeki, Motoki Higa, Yuji Kominami, Takashi Hamada, Tetsuya Matsui, Masatsugu Yasuda, Nobuyuki Tanaka

Background: The Rock Ptarmigan Lagopus muta japonica lives in the alpine zones of central Japan, which is the southern limit of the global distribution for this species. This species is highly dependent on alpine habitats, which are considered vulnerable to rapid climate change. This study aimed to assess the impact of climate change on potential L. muta japonica habitat based on predicted changes to alpine vegetation, to identify population vulnerability under future climatic conditions for conservation planning. We developed species distribution models, which considered the structure of the alpine ecosystem by incorporating spatial hierarchy on specific environmental factors to assess the potential habitats for L. muta japonica under current and future climates. We used 24 general circulation models (GCMs) for 2081-2100 as future climate conditions.

Results: The predicted potential habitat for L. muta japonica was similar to the actual distribution of the territories in the study area of Japan's northern Alps (36.25-36.5°N, 137.5-137.7°E). Future potential habitat for L. muta japonica was projected to decrease to 0.4% of the current potential habitat in the median of occurrence probabilities under 24 GCMs, due to a decrease in alpine vegetation communities. Some potential habitats in the central and northwestern part of the study area were predicted to be sustained in the future, depending on the GCMs.

Conclusions: Our model results predicted that the potential habitats for L. muta japonica in Japan's northern Alps, which provides core habitat for this subspecies, would be vulnerable by 2081-2100. Small sustainable habitats may serve as refugia, facilitating the survival of L. muta japonica populations under future climatic conditions. Impact assessment studies of the effect of climate change on L. muta japonica habitats at a nationwide scale are urgently required to establish effective conservation planning for this species, which includes identifying candidate areas for assisted migration as an adaptive strategy.

背景:岩雷鸟(Lagopus muta japonica)生活在日本中部的高山地带,这是该物种全球分布的南部界限。该物种高度依赖高山栖息地,而高山栖息地被认为容易受到快速气候变化的影响。本研究旨在基于预测的高山植被变化,评估气候变化对柽柳潜在生境的影响,确定未来气候条件下柽柳种群的脆弱性,为柽柳保护规划提供依据。本文建立了考虑高寒生态系统结构的物种分布模型,结合特定环境因子的空间层次,评价了当前和未来气候条件下柽柳的潜在生境。我们使用2081-2100年的24个大气环流模式(GCMs)作为未来气候条件。结果:在日本北阿尔卑斯研究区(36.25 ~ 36.5°N, 137.5 ~ 137.7°E),预测的变异日本l.a japonica潜在生境与实际分布基本一致。在24个gcm条件下,由于高寒植被群落的减少,预计柽柳未来的潜在生境将减少到目前潜在生境的0.4%。根据大气环流预测,研究区中部和西北部的一些潜在栖息地将在未来持续存在。结论:该模型预测,2081-2100年,日本北阿尔卑斯地区为该亚种提供核心栖息地的潜在栖息地将变得脆弱。小型可持续生境可以作为避难所,促进日本l.a muta japonica种群在未来气候条件下的生存。目前迫切需要在全国范围内开展气候变化对柽柳生境的影响评估研究,以建立有效的柽柳保护规划,包括确定辅助迁移候选区作为适应策略。
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引用次数: 21
Spatial and temporal dynamics of Antarctic shallow soft-bottom benthic communities: ecological drivers under climate change. 南极浅层软底栖生物群落时空动态:气候变化下的生态驱动因素
IF 2.2 2区 环境科学与生态学 Q1 Agricultural and Biological Sciences Pub Date : 2019-07-01 DOI: 10.1186/s12898-019-0244-x
Belinda J Vause, Simon A Morley, Vera G Fonseca, Anna Jażdżewska, Gail V Ashton, David K A Barnes, Hendrik Giebner, Melody S Clark, Lloyd S Peck

Background: Marine soft sediments are some of the most widespread habitats in the ocean, playing a vital role in global carbon cycling, but are amongst the least studied with regard to species composition and ecosystem functioning. This is particularly true of the Polar Regions, which are currently undergoing rapid climate change, the impacts of which are poorly understood. Compared to other latitudes, Polar sediment habitats also experience additional environmental drivers of strong seasonality and intense disturbance from iceberg scouring, which are major structural forces for hard substratum communities. This study compared sediment assemblages from two coves, near Rothera Point, Antarctic Peninsula, 67°S in order to understand the principal drivers of community structure, for the first time, evaluating composition across all size classes from mega- to micro-fauna.

Results: Morpho-taxonomy identified 77 macrofaunal species with densities of 464-16,084 individuals m-2. eDNA metabarcoding of microfauna, in summer only, identified a higher diversity, 189 metazoan amplicon sequence variants (ASVs) using the 18S ribosomal RNA and 249 metazoan ASVs using the mitochondrial COI gene. Both techniques recorded a greater taxonomic diversity in South Cove than Hangar Cove, with differences in communities between the coves, although the main taxonomic drivers varied between techniques. Morphotaxonomy identified the main differences between coves as the mollusc, Altenaeum charcoti, the cnidarian Edwardsia sp. and the polychaetes from the family cirratulidae. Metabarcoding identified greater numbers of species of nematodes, crustaceans and Platyhelminthes in South Cove, but more bivalve species in Hangar Cove. There were no detectable differences in community composition, measured through morphotaxonomy, between seasons, years or due to iceberg disturbance.

Conclusions: This study found that unlike hard substratum communities the diversity of Antarctic soft sediment communities is correlated with the same factors as other latitudes. Diversity was significantly correlated with grain size and organic content, not iceberg scour. The increase in glacial sediment input as glaciers melt, may therefore be more important than increased iceberg disturbance.

背景:海洋软沉积物是海洋中最广泛的栖息地之一,在全球碳循环中起着至关重要的作用,但在物种组成和生态系统功能方面研究最少。极地地区尤其如此,那里目前正在经历迅速的气候变化,人们对其影响知之甚少。与其他纬度相比,极地沉积物栖息地还经历了强季节性和冰山冲刷强烈干扰的额外环境驱动因素,这是硬基质群落的主要结构力量。为了了解群落结构的主要驱动因素,本研究首次对南极半岛Rothera Point附近的两个海湾的沉积物组合进行了比较,评估了从大型到微型动物的所有大小类别的组成。结果:形态分类鉴定出大型动物种77种,密度为464 ~ 16084只m-2。仅在夏季,利用18S核糖体RNA鉴定出189个后生动物扩增子序列变异(asv),利用线粒体COI基因鉴定出249个后生动物asv。两种方法均记录到南湾的分类多样性高于机库湾,但在不同的海湾之间存在差异,尽管主要的分类驱动因素因技术而异。形态分类学鉴定的主要差异为软体动物Altenaeum charcoti,针孔动物Edwardsia sp.和多毛动物cirratulidae科。元条形码鉴定出南湾的线虫、甲壳类和扁形类较多,而机库湾的双壳类较多。通过形态分类学测量,在季节、年份之间或由于冰山干扰,群落组成没有可检测到的差异。结论:本研究发现,与硬基质群落不同,南极软沉积物群落多样性与其他纬度相同的因子相关。多样性与粒度和有机质含量显著相关,与冰山冲刷无关。因此,随着冰川融化,冰川沉积物输入的增加可能比冰山扰动的增加更为重要。
{"title":"Spatial and temporal dynamics of Antarctic shallow soft-bottom benthic communities: ecological drivers under climate change.","authors":"Belinda J Vause,&nbsp;Simon A Morley,&nbsp;Vera G Fonseca,&nbsp;Anna Jażdżewska,&nbsp;Gail V Ashton,&nbsp;David K A Barnes,&nbsp;Hendrik Giebner,&nbsp;Melody S Clark,&nbsp;Lloyd S Peck","doi":"10.1186/s12898-019-0244-x","DOIUrl":"https://doi.org/10.1186/s12898-019-0244-x","url":null,"abstract":"<p><strong>Background: </strong>Marine soft sediments are some of the most widespread habitats in the ocean, playing a vital role in global carbon cycling, but are amongst the least studied with regard to species composition and ecosystem functioning. This is particularly true of the Polar Regions, which are currently undergoing rapid climate change, the impacts of which are poorly understood. Compared to other latitudes, Polar sediment habitats also experience additional environmental drivers of strong seasonality and intense disturbance from iceberg scouring, which are major structural forces for hard substratum communities. This study compared sediment assemblages from two coves, near Rothera Point, Antarctic Peninsula, 67°S in order to understand the principal drivers of community structure, for the first time, evaluating composition across all size classes from mega- to micro-fauna.</p><p><strong>Results: </strong>Morpho-taxonomy identified 77 macrofaunal species with densities of 464-16,084 individuals m<sup>-2</sup>. eDNA metabarcoding of microfauna, in summer only, identified a higher diversity, 189 metazoan amplicon sequence variants (ASVs) using the 18S ribosomal RNA and 249 metazoan ASVs using the mitochondrial COI gene. Both techniques recorded a greater taxonomic diversity in South Cove than Hangar Cove, with differences in communities between the coves, although the main taxonomic drivers varied between techniques. Morphotaxonomy identified the main differences between coves as the mollusc, Altenaeum charcoti, the cnidarian Edwardsia sp. and the polychaetes from the family cirratulidae. Metabarcoding identified greater numbers of species of nematodes, crustaceans and Platyhelminthes in South Cove, but more bivalve species in Hangar Cove. There were no detectable differences in community composition, measured through morphotaxonomy, between seasons, years or due to iceberg disturbance.</p><p><strong>Conclusions: </strong>This study found that unlike hard substratum communities the diversity of Antarctic soft sediment communities is correlated with the same factors as other latitudes. Diversity was significantly correlated with grain size and organic content, not iceberg scour. The increase in glacial sediment input as glaciers melt, may therefore be more important than increased iceberg disturbance.</p>","PeriodicalId":9232,"journal":{"name":"BMC Ecology","volume":"19 1","pages":"27"},"PeriodicalIF":2.2,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1186/s12898-019-0244-x","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"37380420","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 23
Light pollution affects space use and interaction of two small mammal species irrespective of personality. 光污染影响了两种小型哺乳动物的空间利用和相互作用,而不考虑其个性。
IF 2.2 2区 环境科学与生态学 Q1 Agricultural and Biological Sciences Pub Date : 2019-06-18 DOI: 10.1186/s12898-019-0241-0
Julia Hoffmann, Annika Schirmer, Jana Anja Eccard

Background: Artificial light at night (ALAN) is one form of human-induced rapid environmental changes (HIREC) and is strongly interfering with natural dark-light cycles. Some personality types within a species might be better suited to cope with environmental change and therefore might be selected upon under ongoing urbanization.

Results: We used LED street lamps in a large outdoor enclosure to experimentally investigate the effects of ALAN on activity patterns, movement and interaction of individuals of two species, the bank vole (Myodes glareolus) and the striped field mouse (Apodemus agrarius). We analyzed effects combined with individual boldness score. Both species reduced their activity budget during daylight hours. While under natural light conditions home ranges were larger during daylight than during nighttime, this difference vanished under ALAN. Conspecifics showed reduced home range overlap, proximity and activity synchrony when subjected to nighttime illumination. Changes in movement patterns in reaction to ALAN were not associated with differences in boldness score of individuals.

Conclusions: Our results suggest that light pollution can lead to changes in movement patterns and individual interactions in small mammals. This could lead to fitness consequences on the population level.

背景:夜间人造光(ALAN)是人类引起的快速环境变化(HIREC)的一种形式,强烈干扰自然暗光周期。一个物种中的某些人格类型可能更适合于应对环境变化,因此可能在持续的城市化中被选择。结果:利用LED路灯在大型室外环境中,实验研究了ALAN对银田鼠(Myodes glareolus)和条纹田鼠(Apodemus agrarius)两种田鼠的活动模式、运动和相互作用的影响。结合个体大胆度评分分析效果。这两个物种在白天都减少了它们的活动预算。虽然在自然光条件下,白天的家庭范围比夜间大,但这种差异在ALAN下消失了。当受到夜间照明时,同种动物表现出家园范围重叠、接近和活动同步减少。对ALAN反应的运动模式的变化与个体大胆得分的差异无关。结论:我们的研究结果表明,光污染会导致小型哺乳动物的运动模式和个体相互作用的变化。这可能会导致种群水平上的适应性结果。
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引用次数: 16
Are all patches worth exploring? Foraging desert birds do not rely on environmental indicators of seed abundance at small scales. 是否所有补丁都值得探索?在小尺度上,觅食的沙漠鸟类不依赖于种子丰度的环境指标。
IF 2.2 2区 环境科学与生态学 Q1 Agricultural and Biological Sciences Pub Date : 2019-06-18 DOI: 10.1186/s12898-019-0242-z
Fernando A Milesi, Javier Lopez de Casenave, Víctor R Cueto

Background: Consumers should show strong spatial preferences when foraging in environments where food availability is highly heterogeneous and predictable. Postdispersal granivores face this scenario in most arid areas, where soil seed bank abundance and composition associates persistently with vegetation structure at small scales (decimetres to metres). Those environmental features should be exploited as useful pre-harvest information, at least to avoid patches predicted to be poor. However, we did not find the expected spatial association in the algarrobal of the central Monte desert by observing foraging seed-eating birds, a field technique influenced by how much they exploit visited patches. In this work we tested if the first stage of foraging by granivorous birds (patch visit, encounter or exploration) is positively associated with environmental indicators of patch quality by recording the removal of single seeds from 300 scattered experimental devices during seasonal trials. Spatial selectivity was analysed by comparing the structural characteristics of used vs. available microhabitats, and evaluated against bottom-up and top-down hypotheses based on our previous knowledge on local seed bank abundance, composition and dynamics. Their foraging activity was also explored for spatial autocorrelation and environmental correlates at bigger scales.

Results: Postdispersal granivorous birds were less selective in their use of foraging space than expected if microhabitat appearance were providing them relevant information to guide their search for profitable foraging patches. No microhabitat type, as defined by their vegetation structure and soil cover, remained safe from bird exploration. Analyses at bigger temporal and spatial scales proved more important to describe heterogeneity in seed removal.

Conclusions: Closeness to tall trees, probably related to bird territoriality and reproduction or to their perception of predation risk, seemed to determine a first level of habitat selection, constraining explorable space. Then, microhabitat openness (rather than seed abundance) exerted some positive influence on which patches were more frequently visited among those accessible. Selective patterns by birds at small scales were closer to our predictions of a top-down spatial effect, with seed consumption creating or strengthening (and not responding to) the spatial pattern and dynamics of the seed bank.

背景:当消费者在食物可得性高度异质性和可预测的环境中觅食时,应该表现出强烈的空间偏好。在大多数干旱地区,土壤种子库的丰度和组成与小尺度(分米到米)的植被结构持续相关,分散后的花岗岩动物面临这种情况。这些环境特征应该作为有用的收获前信息加以利用,至少可以避免被预测为贫瘠的斑块。然而,通过观察以种子为食的鸟类的觅食,我们并没有在蒙特沙漠中部的藻类中发现预期的空间关联,这种野外技术受它们对到访斑块的利用程度的影响。在这项工作中,我们通过记录在季节性试验中从300个分散的实验装置中移除单个种子的情况,测试了食草鸟类觅食的第一阶段(斑块访问,遇到或探索)是否与斑块质量的环境指标呈正相关。通过比较已利用微生境与可利用微生境的结构特征,分析了空间选择性,并基于我们对当地种子库丰度、组成和动态的了解,对自下而上和自上而下的假设进行了评估。在更大尺度上探讨了其觅食活动的空间自相关性和环境相关性。结果:如果微生境的出现能提供相关的信息来指导它们寻找有利可图的觅食斑块,那么分散后的食蚁鸟在觅食空间的选择上比预期的要差。由植被结构和土壤覆盖所定义的微生境类型,没有一种是鸟类可以安全地探索的。在更大的时间和空间尺度上的分析对描述种子去除的异质性更为重要。结论:靠近高大的树木,可能与鸟类的领土和繁殖或它们对捕食风险的感知有关,似乎决定了第一层次的栖息地选择,限制了可探索的空间。微生境开放程度(而非种子丰度)对可达斑块的访问频率有一定的正向影响。鸟类在小尺度上的选择模式与我们预测的自上而下的空间效应更接近,种子消耗创造或加强(而不是响应)种子库的空间格局和动态。
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引用次数: 0
The relative contributions of climate, soil, diversity and interactions to leaf trait variation and spectrum of invasive Solidago canadensis. 气候、土壤、多样性和相互作用对入侵加拿大一枝黄花叶片性状变异和光谱的相对贡献
IF 2.2 2区 环境科学与生态学 Q1 Agricultural and Biological Sciences Pub Date : 2019-06-15 DOI: 10.1186/s12898-019-0240-1
Li-Jia Dong, Wei-Ming He

Background: Invasive plants commonly occupy diverse habitats and thus must adapt to changing environmental pressures through altering their traits and economics spectra, and addressing these patterns and their drivers has an importantly ecological and/or evolutionary significance. However, few studies have considered the role of multiple biotic and abiotic factors in shaping trait variation and spectra. In this study, we determined seven leaf traits of 66 Solidago canadensis populations, and quantified the relative contributions of climate, soil properties, native plant diversity, and S. canadensis-community interactions (in total 16 factors) to leaf trait variation and spectrum with multimodel inference.

Results: Overall, the seven leaf traits had high phenotypic variation, and this variation was highest for leaf dry matter content and lowest for leaf carbon concentration. The per capita contribution of climate to the mean leaf trait variation was highest (7.5%), followed by soil properties (6.2%), S. canadensis-community interactions (6.1%), and native plant diversity (5.4%); the dominant factors underlying trait variation varied with leaf traits. Leaf production potential was negatively associated with leaf stress-tolerance potential, and the relative contributions to this trade-off followed in order: native plant diversity (7.7%), climate (6.9%), S. canadensis-community interactions (6.2%), and soil properties (5.6%). Climate, diversity, soil, and interactions had positive, neutral or negative effects.

Conclusions: Climate, soil, diversity, and interactions contribute differentially to the leaf trait variation and economics spectrum of S. canadensis, and their relative importance and directions depend on plant functional traits.

背景:入侵植物通常占据多样化的栖息地,因此必须通过改变其性状和经济光谱来适应不断变化的环境压力,研究这些模式及其驱动因素具有重要的生态和/或进化意义。然而,很少有研究考虑到多种生物和非生物因素在性状变异和光谱形成中的作用。本研究通过对66个加拿大一枝黄花居群的7个叶片性状的测定,通过多模型推理,量化了气候、土壤性质、本土植物多样性和群落间相互作用(共16个因子)对叶片性状变异和光谱的相对贡献。结果:总体而言,7个叶片性状存在较大的表型变异,其中干物质含量变异最大,碳浓度变异最小。气候对平均叶片性状变异的人均贡献最大(7.5%),其次是土壤性质(6.2%)、加拿大南芥-群落相互作用(6.1%)和本地植物多样性(5.4%);性状变异的主导因子因叶片性状而异。叶片生产潜力与叶片抗逆性潜力呈负相关,对这种权衡的相对贡献依次为:本地植物多样性(7.7%)、气候(6.9%)、加拿大南芥-群落相互作用(6.2%)和土壤性质(5.6%)。气候、多样性、土壤和相互作用有积极、中性或消极的影响。结论:气候、土壤、多样性和相互作用对加拿大草叶片性状变异和经济谱的影响存在差异,其相对重要性和方向取决于植物功能性状。
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引用次数: 16
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BMC Ecology
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