Abstract:
:Dams are recognised to impact aquatic biodiversity, but the effects and conclusions diverge across studies and locations. By using a meta-analytical approach, we quantified the effects of impoundment on fish communities distributed across three large biomes. The impacts of dams on richness and diversity differed across biomes, with significant declines in the tropics, lower amplitude but similar directional changes in temperate regions, and no changes in boreal regions. Our analyses showed that non-native species increased significantly in tropical and temperate regulated rivers, but not in boreal rivers. In contrast, temporal trajectories in fish assemblage metrics were common across regions, with all biomes showing an increase in mean trophic level position and in the proportion of generalist species after impoundment. Such changes in fish assemblages may affect food web stability and merit closer study. Across the literature examined, predominant mechanisms that render fish assemblages susceptible to impacts from dams were: (1) the transformation of the lotic environment into a lentic environment; (2) habitat fragmentation and (3) the introduction of non-native species. Collectively, our results highlight that an understanding of the regional context and a suite of community metrics are needed to make robust predictions about how fish will respond to river impoundments.
journal_name
Ecol Lettjournal_title
Ecology lettersauthors
Turgeon K,Turpin C,Gregory-Eaves Idoi
10.1111/ele.13283subject
Has Abstractpub_date
2019-09-01 00:00:00pages
1501-1516issue
9eissn
1461-023Xissn
1461-0248journal_volume
22pub_type
杂志文章,评审相关文献
ECOLOGY LETTERS文献大全abstract::Synchronised and quasi-periodic production of seeds by plant populations, known as masting, is implicated in many ecological processes, but how it arises remains poorly understood. Flowering and pollination dynamics are hypothesised to provide the mechanistic link for the observed relationship between weather and popu...
journal_title:Ecology letters
pub_type: 信件
doi:10.1111/ele.13609
更新日期:2020-12-01 00:00:00
abstract::Habitat selection, including oviposition site choice, is an important driver of community assembly in freshwater systems. Factors determining patch quality are assessed by many colonising organisms and affect colonisation rates, spatial distribution and community structure. For many species, the presence/absence of pr...
journal_title:Ecology letters
pub_type: 信件
doi:10.1111/ele.12553
更新日期:2016-02-01 00:00:00
abstract::Climatic conditions vary in spatial frequency globally. Spatially rare climatic conditions provide fewer suitable environments than common ones and should impose constraints on the types of species present locally and regionally. We used data on 467 North American angiosperms to test the effects of the spatial frequen...
journal_title:Ecology letters
pub_type: 信件
doi:10.1111/ele.13425
更新日期:2020-02-01 00:00:00
abstract::Biological control of exotic invasive plants using exotic insects is practiced under the assumption that biological control agents are safe if they do not directly attack non-target species. We tested this assumption by evaluating the potential for two host-specific biological control agents (Urophora spp.), widely es...
journal_title:Ecology letters
pub_type: 信件
doi:10.1111/j.1461-0248.2006.00896.x
更新日期:2006-04-01 00:00:00
abstract::In many animals acquiring limited reproductive opportunities involves competition for resources, mates and opposite-sex gametes. There is ambiguity in which competitive steps are included in measures of sexual selection: individuals who fail to obtain resources necessary for reproduction are often excluded. We illustr...
journal_title:Ecology letters
pub_type: 杂志文章
doi:10.1111/j.1461-0248.2010.01495.x
更新日期:2010-09-01 00:00:00
abstract::Temperature and precipitation explain about half the variation in aboveground net primary production (ANPP) among tropical forest sites, but determinants of remaining variation are poorly understood. Here, we test the hypothesis that the amount of leaf area, and its vertical arrangement, predicts ANPP when other varia...
journal_title:Ecology letters
pub_type: 信件
doi:10.1111/ele.13214
更新日期:2019-03-01 00:00:00
abstract::Correlations between traits may constrain ecological and evolutionary responses to multispecies interactions. Many plants produce defensive compounds in nectar and leaves that could influence interactions with pollinators and herbivores, but the relationship between nectar and leaf defences is entirely unexplored. Cor...
journal_title:Ecology letters
pub_type: 杂志文章
doi:10.1111/j.1461-0248.2006.00944.x
更新日期:2006-08-01 00:00:00
abstract::Limited dispersal is commonly used to explain differences in diversification rates. An obvious but unexplored factor affecting dispersal is the mode of locomotion used by animals. Whether individuals walk, swim or fly can dictate the type and severity of geographical barriers to dispersal, and determine the general ra...
journal_title:Ecology letters
pub_type: 杂志文章
doi:10.1111/ele.12930
更新日期:2018-05-01 00:00:00
abstract::There is increasing pressure from policymakers for ecologists to generate more detailed 'attribution' analyses aimed at quantitatively estimating relative contributions of different driving forces, including anthropogenic climate change (ACC), to observed biological changes. Here, we argue that this approach is not pr...
journal_title:Ecology letters
pub_type: 杂志文章
doi:10.1111/ele.12098
更新日期:2013-05-01 00:00:00
abstract::Apex predators can limit the abundance and behaviour of mesopredators, thereby reducing predation on smaller species. We know less about whether native apex predators are effective in suppressing invasive mesopredators, a major global driver of vertebrate extinctions. We use the severe disease-induced decline of an ap...
journal_title:Ecology letters
pub_type: 信件
doi:10.1111/ele.13473
更新日期:2020-04-01 00:00:00
abstract::The tendency of trees to grow taller with increasing water availability is common knowledge. Yet a robust, universal relationship between the spatial distribution of water availability and forest canopy height (H) is lacking. Here, we created a global water availability map by calculating an annual budget as the diffe...
journal_title:Ecology letters
pub_type: 信件
doi:10.1111/ele.12525
更新日期:2015-12-01 00:00:00
abstract::Species extinctions are biased towards higher trophic levels, and primary extinctions are often followed by unexpected secondary extinctions. Currently, predictions on the vulnerability of ecological communities to extinction cascades are based on models that focus on bottom-up effects, which cannot capture the effect...
journal_title:Ecology letters
pub_type: 信件
doi:10.1111/ele.12096
更新日期:2013-05-01 00:00:00
abstract::Food-web complexity often hinders disentangling functionally relevant aspects of food-web structure and its relationships to biodiversity. Here, we present a theoretical framework to evaluate food-web complexity in terms of biodiversity. Food network unfolding is a theoretical method to transform a complex food web in...
journal_title:Ecology letters
pub_type: 杂志文章
doi:10.1111/ele.12973
更新日期:2018-07-01 00:00:00
abstract::Community assembly history is increasingly recognized as a fundamental determinant of community structure. However, little is known as to how assembly history may affect ecosystem functioning via its effect on community structure. Using wood-decaying fungi as a model system, we provide experimental evidence that large...
journal_title:Ecology letters
pub_type: 杂志文章
doi:10.1111/j.1461-0248.2010.01465.x
更新日期:2010-06-01 00:00:00
abstract::The frequency and magnitude of extreme climate events are increasing with global change, yet we lack predictions and empirical evidence for the ability of wild populations to persist and adapt in response to these events. Here, we used Fisher's Fundamental Theorem of Natural Selection to evaluate the adaptive potentia...
journal_title:Ecology letters
pub_type: 信件
doi:10.1111/ele.13244
更新日期:2019-05-01 00:00:00
abstract::Maternal hormones are important mediators of prenatal maternal effects. Although many experimental studies have demonstrated their potency in shaping offspring phenotypes, we know remarkably little about their adaptive value. Using long-term data on a wild collared flycatcher (Ficedula albicollis) population, we show ...
journal_title:Ecology letters
pub_type: 杂志文章
doi:10.1111/ele.12339
更新日期:2014-10-01 00:00:00
abstract::Understanding the factors that determine rates of range expansion is not only crucial for developing risk assessment schemes and management strategies for invasive species, but also provides important insight into the ability of species to disperse in response to climate change. However, there is little knowledge on w...
journal_title:Ecology letters
pub_type: 杂志文章
doi:10.1111/ele.12286
更新日期:2014-07-01 00:00:00
abstract::The spatial insurance hypothesis indicates that connectivity is an important attribute of natural ecosystems that sustains both biodiversity and ecosystem function. We tested the hypothesis by measuring the impact of manipulating connectivity in experimental metacommunties of a natural and diverse microecosystem. Isol...
journal_title:Ecology letters
pub_type: 杂志文章
doi:10.1111/j.1461-0248.2010.01450.x
更新日期:2010-05-01 00:00:00
abstract::Little is known about the impact of ocean acidification on predator-prey dynamics. Herein, we examined the effect of carbon dioxide (CO(2)) on both prey and predator by letting one predatory reef fish interact for 24 h with eight small or large juvenile damselfishes from four congeneric species. Both prey and predator...
journal_title:Ecology letters
pub_type: 信件
doi:10.1111/j.1461-0248.2011.01683.x
更新日期:2011-11-01 00:00:00
abstract::The genetic basis of organism response to stoichiometric mismatches between environmental availability and somatic demand is still poorly understood. This study reports a consistent genotype x environment interaction related to phosphorus : carbon availability to Daphnia. In multiple pairs of Daphnia pulicaria clones,...
journal_title:Ecology letters
pub_type: 杂志文章
doi:10.1111/j.1461-0248.2009.01368.x
更新日期:2009-11-01 00:00:00
abstract::There have been numerous investigations of parasite local adaptation, a phenomenon important from the perspectives of both basic and applied evolutionary ecology. Recent work has demonstrated that temperature has striking effects on parasite performance by mediating trade-offs in parasite life history and through geno...
journal_title:Ecology letters
pub_type: 杂志文章
doi:10.1111/j.1461-0248.2007.01146.x
更新日期:2008-04-01 00:00:00
abstract::Correlative species distribution models are based on the observed relationship between species' occurrence and macroclimate or other environmental variables. In climates predicted less favourable populations are expected to decline, and in favourable climates they are expected to persist. However, little comparative e...
journal_title:Ecology letters
pub_type: 信件
doi:10.1111/ele.12794
更新日期:2017-08-01 00:00:00
abstract::Plant growth can be limited by resource acquisition and defence against consumers, leading to contrasting trade-off possibilities. The competition-defence hypothesis posits a trade-off between competitive ability and defence against enemies (e.g. herbivores and pathogens). The growth-defence hypothesis suggests that s...
journal_title:Ecology letters
pub_type: 杂志文章
doi:10.1111/ele.12078
更新日期:2013-04-01 00:00:00
abstract::Asexual taxa often have larger ranges than their sexual progenitors, particularly in areas affected by Pleistocene glaciations. The reasons given for this 'geographical parthenogenesis' are contentious, with expansion of the ecological niche or colonisation advantages of uniparental reproduction assumed most important...
journal_title:Ecology letters
pub_type: 杂志文章
doi:10.1111/ele.12908
更新日期:2018-03-01 00:00:00
abstract::For decades, ecologists have hypothesised that exposure to plant secondary compounds (PSCs) modifies herbivore-associated microbial community composition. This notion has not been critically evaluated in wild mammalian herbivores on evolutionary timescales. We investigated responses of the microbial communities of two...
journal_title:Ecology letters
pub_type: 杂志文章
doi:10.1111/j.1461-0248.2012.01822.x
更新日期:2012-09-01 00:00:00
abstract::Research on the ecological and evolutionary roles of phytochemicals has recently progressed from studying single compounds to examining chemical diversity itself. A key conceptual advance enabling this progression is the use of species diversity metrics for quantifying phytochemical diversity. In this perspective, we ...
journal_title:Ecology letters
pub_type: 杂志文章
doi:10.1111/ele.13422
更新日期:2020-01-01 00:00:00
abstract::With rapidly increasing rates of contemporary extinction, predicting extinction vulnerability and identifying how multiple stressors drive non-random species loss have become key challenges in ecology. These assessments are crucial for avoiding the loss of key functional groups that sustain ecosystem processes and ser...
journal_title:Ecology letters
pub_type: 杂志文章
doi:10.1111/j.1461-0248.2011.01592.x
更新日期:2011-04-01 00:00:00
abstract::In the short-term heterotrophic soil respiration is strongly and positively related to temperature. In the long-term, its response to temperature is uncertain. One reason for this is because in field experiments increases in respiration due to warming are relatively short-lived. The explanations proposed for this ephe...
journal_title:Ecology letters
pub_type: 杂志文章
doi:10.1111/j.1461-0248.2008.01251.x
更新日期:2008-12-01 00:00:00
abstract::Temporal patterns of flower opening and closure within a day are known as Linné's floral clock. Time of flower closure has been explained mainly by light in the traditional botanical literature. We show with a set of experiments that Asteraceae flower heads can close within three hours after pollination, whereas un-po...
journal_title:Ecology letters
pub_type: 信件
doi:10.1111/j.1461-0248.2011.01654.x
更新日期:2011-09-01 00:00:00
abstract::Shifts in the phenologies of coexistence species are altering the temporal structure of natural communities worldwide. However, predicting how these changes affect the structure and long-term dynamics of natural communities is challenging because phenology and coexistence theory have largely proceeded independently. H...
journal_title:Ecology letters
pub_type: 杂志文章,评审
doi:10.1111/ele.13277
更新日期:2019-08-01 00:00:00