Abstract:
:Understanding the drivers and consequences of disease epidemics is an important frontier in ecology. However, long-term data on hosts, their parasites, and the corresponding environmental conditions necessary to explore these interactions are often unavailable. We examined the dynamics of Daphnia pulicaria, a keystone zooplankter in lake ecosystems, to explore the long-term causes and consequences of infection by a chytridiomycete parasitoid (Polycaryum laeve). After quantifying host-pathogen dynamics from vouchered samples collected over 15 years, we used autoregressive models to evaluate (1) hypothesized drivers of infection, including host density, water temperature, dissolved oxygen, host-food availability, and lake mixing; and (2) the effects of epidemics on host populations. Infection was present in most years but varied widely in prevalence, from < 1% to 34%, with seasonal peaks in early spring and late fall. Within years, lake stratification strongly inhibited P. laeve transmission, such that epidemics occurred primarily during periods of water mixing. Development of the thermocline likely reduced transmission by spatially separating susceptible hosts from infectious zoospores. Among years, ice duration and cumulative snowfall correlated negatively with infection prevalence, likely because of reductions in spring phytoplankton and D. pulicaria density in years with extended winters. Epidemics also influenced dynamics of the host population. Infected D. pulicaria rarely (< 1%) contained eggs, and P. laeve prevalence was positively correlated with sexual reproduction in D. pulicaria. Analyses of D. pulicaria density-dependent population dynamics predicted that, in the absence of P. laeve infection, host abundance would be 11-50% higher than what was observed. By underscoring the importance of complex physical processes in controlling host-parasite interactions and of epidemic disease in influencing host populations, our results highlight the value of long-term data for understanding wildlife disease dynamics.
journal_name
Ecologyjournal_title
Ecologyauthors
Johnson PT,Ives AR,Lathrop RC,Carpenter SRdoi
10.1890/07-2071.1subject
Has Abstractpub_date
2009-01-01 00:00:00pages
132-44issue
1eissn
0012-9658issn
1939-9170journal_volume
90pub_type
杂志文章相关文献
ECOLOGY文献大全abstract::Recurrent, low-severity fire in ponderosa pine (Pinus ponderosa)/interior Douglas-fir (Pseudotsuga menziesii var. glauca) forests is thought to have directly influenced nitrogen (N) cycling and availability. However, no studies to date have investigated the influence of natural fire intervals on soil processes in undi...
journal_title:Ecology
pub_type: 杂志文章
doi:10.1890/0012-9658(2006)87[2511:ffanti]2.0.co;2
更新日期:2006-10-01 00:00:00
abstract::The most abundant elements contained in stem flow from American beech (Fagus grandifolia), red oak (Quercus rubra), and sugar maple (Acer saccharum) were C > K = Ca > Na = Mg = P. Variations in leaching potential and in concentration of chemical constituents around the base of beech trees, due to non-uniform stem flow...
journal_title:Ecology
pub_type: 杂志文章
doi:10.2307/1934160
更新日期:1971-07-01 00:00:00
abstract::Identifying the factors that destabilize communities is critical for predicting and mitigating the ecological impacts of environmental change. Although theory has shown that local ecosystem size and regional dispersal can determine biodiversity, less is known about the direct and indirect effects of these factors on c...
journal_title:Ecology
pub_type: 杂志文章
doi:10.1002/ecy.2992
更新日期:2020-04-01 00:00:00
abstract::Latitudinal patterns of nonnative species richness suggest fewer successful invasions in the tropics, relative to temperate regions. One main hypothesis for this pattern is that biotic resistance to invasion is stronger in the tropics than at higher latitudes. Biotic resistance can limit the distribution and abundance...
journal_title:Ecology
pub_type: 杂志文章
doi:10.1890/12-1382.1
更新日期:2013-06-01 00:00:00
abstract::The majority of food web studies are based on connectivity, top-down impacts, bottom-up flows, or trophic position (TP), and ecologists have argued for decades which is best. Rarely have any two been considered simultaneously. The present study uses a procedure that integrates the last three approaches based on taxon-...
journal_title:Ecology
pub_type: 杂志文章
doi:10.1002/ecy.2228
更新日期:2018-06-01 00:00:00
abstract::Theory predicts that reproduction will change as individuals near the end of their lives by either increasing reproductive allocation (terminal allocation hypothesis) or decreasing allocation (senescence hypothesis) toward the end of life. Although senescence has received more support, few studies examine how both age...
journal_title:Ecology
pub_type: 杂志文章
doi:10.1002/ecy.1851
更新日期:2017-09-01 00:00:00
abstract::In many organisms, specific predator species induce defensive phenotypes that are qualitatively different from the phenotypes induced by other predator species. This differential induction implies that there is no optimal phenotype that works best against all predators. However, few studies have actually tested the hy...
journal_title:Ecology
pub_type: 杂志文章
doi:10.1890/05-0381
更新日期:2006-02-01 00:00:00
abstract::The ecological impact of rapid environmental change will depend on the resistance of key ecosystems processes, which may be promoted by species that exert strong control over local environmental conditions. Recent theoretical work suggests that macrodetritivores increase the resistance of African savanna ecosystems to...
journal_title:Ecology
pub_type: 杂志文章
doi:10.1002/ecy.1658
更新日期:2017-02-01 00:00:00
abstract::The expansion of shrubs and trees across high-latitude ecosystems is one of the most dramatic ecological manifestations of climate change. Most of the work quantifying these changes has been done in small areas and over relatively recent time scales. These land-cover transitions are highly spatially variable, and we h...
journal_title:Ecology
pub_type: 杂志文章
doi:10.1002/ecy.2660
更新日期:2019-05-01 00:00:00
abstract::Parasites are ubiquitous in natural systems and ecosystem-level effects should be proportional to the amount of biomass or energy flow altered by the parasites. Here we quantified the extent to which a manipulative parasite altered the flow of energy through a forest-stream ecosystem. In a Japanese headwater stream, c...
journal_title:Ecology
pub_type: 杂志文章
doi:10.1890/09-1565.1
更新日期:2011-01-01 00:00:00
abstract::We considered Cushing's match/mismatch theory in a heterotrophic environment and hypothesized that settlement and recruitment success in blue mussel are higher when the food supply is rich in polyunsaturated and essential fatty acids (PUFA/EFA). To test this hypothesis, we monitored larval development as well as fatty...
journal_title:Ecology
pub_type: 杂志文章
doi:10.1890/11-1292.1
更新日期:2012-08-01 00:00:00
abstract::Animal movements in heterogeneous environments play a crucial role in a variety of ecological processes. Although a hierarchical structure to the scale of movements has been observed in many animal species, few studies to date have revealed what causes such multi-spatial scale movements within the framework of optimal...
journal_title:Ecology
pub_type: 杂志文章
doi:10.1890/08-1910.1
更新日期:2009-12-01 00:00:00
abstract::Plant biomass or productivity and the species richness of birds are associated across a range of spatial scales. Species-energy theory is generally assumed to explain these correlations. If true, bird richness should also track productivity temporally, and there should be spatial and temporal relationships between pro...
journal_title:Ecology
pub_type: 杂志文章
doi:10.1890/14-0057.1
更新日期:2015-04-01 00:00:00
abstract::While it is well established that climate change affects species distributions and abundances, the impacts of climate change on species interactions has not been extensively studied. This is particularly important for specialists whose interactions are tightly linked, such as between the monarch butterfly (Danaus plex...
journal_title:Ecology
pub_type: 杂志文章
doi:10.1002/ecy.2198
更新日期:2018-05-01 00:00:00
abstract::Loss of functional connectivity following habitat loss and fragmentation could drive species declines. A comprehensive understanding of fragmentation effects on functional connectivity of an ecological assemblage requires investigation of multiple species with different mobilities, at different spatial scales, for eac...
journal_title:Ecology
pub_type: 杂志文章
doi:10.1890/13-1328.1
更新日期:2014-06-01 00:00:00
abstract::Dispersal evolves as an adaptive mechanism to optimize individual fitness across the landscape. Specifically, dispersal represents a mechanism to escape fitness costs resulting from changes in environmental conditions. Decades of empirical work suggest that individuals use local habitat cues to make movement decisions...
journal_title:Ecology
pub_type: 杂志文章
doi:10.1002/ecy.2982
更新日期:2020-04-01 00:00:00
abstract::Long-term studies have revealed that the structure and dynamics of many tropical forests are changing, but the causes and consequences of these changes remain debated. To learn more about the forces driving changes within tropical forests, we investigated shifts in tree species composition over the past 25 years withi...
journal_title:Ecology
pub_type: 杂志文章
doi:10.1890/10-0724.1
更新日期:2011-04-01 00:00:00
abstract::Providing a complete data set with species and trait information for a given area is essential for assessing plant conservation, management, and ecological restoration, for both local and global applications. Also, these data sets provide additional information for surveys or data collections, establishing the startin...
journal_title:Ecology
pub_type: 杂志文章
doi:10.1002/ecy.3091
更新日期:2020-09-01 00:00:00
abstract::Understanding the scale of marine population connectivity is critical for the conservation and sustainable management of marine resources. For many marine species adults are benthic and relatively immobile, so patterns of larval dispersal and recruitment provide the key to understanding marine population connectivity....
journal_title:Ecology
pub_type: 杂志文章
doi:10.1890/07-0091.1
更新日期:2007-12-01 00:00:00
abstract::Plant species composition and diversity is often influenced by early life history stages; thus, global change could dramatically affect plant community structure by altering seed production. Unfortunately, plant reproductive responses to global change are rarely studied in field settings, making it difficult to assess...
journal_title:Ecology
pub_type: 杂志文章
doi:10.1890/07-1351.1
更新日期:2009-07-01 00:00:00
abstract::Factors controlling the spatial distribution of bacterial diversity have been intensely studied, whereas less is known about temporal changes. To address this, we tested whether the mechanisms that underlie bacterial temporal beta-diversity vary across different scales in three marine microbial communities. While seas...
journal_title:Ecology
pub_type: 杂志文章
doi:10.1890/12-2125.1
更新日期:2013-09-01 00:00:00
abstract::Soil nutrients influence the distribution of tree species in lowland tropical forests, but their effect on productivity, especially at local scales, remains unclear. We used tree census, canopy occupancy, and soil data from the Barro Colorado Island (BCI; Panama) 50-ha forest dynamics plot to investigate the influence...
journal_title:Ecology
pub_type: 杂志文章
doi:10.1002/ecy.2532
更新日期:2018-12-01 00:00:00
abstract::Population cycles of herbivores are thought to be driven by trophic interaction mechanisms, either between food plant and herbivore or between the herbivorous prey and its natural enemies. Observational data have indicated that hymenopteran parasitoids cause delayed density-dependent mortality in cyclic autumnal moth ...
journal_title:Ecology
pub_type: 杂志文章
doi:10.1890/09-2076.1
更新日期:2010-09-01 00:00:00
abstract::Does climate determine species' ranges? Rapid rates of anthropogenic warming make this classic ecological question especially relevant. We ask whether climate controls range limits by quantifying relationships between climatic variables (precipitation, temperature) and tree growth across the altitudinal ranges of six ...
journal_title:Ecology
pub_type: 杂志文章
doi:10.1890/10-1639.1
更新日期:2011-06-01 00:00:00
abstract::Insect mutualisms can have disproportionately large impacts on local arthropod and plant communities and their responses to climatic change. The objective of this study was to determine if the presence of insect mutualisms affects host plant and herbivore responses to warming. Using open-top warming chambers at Harvar...
journal_title:Ecology
pub_type: 杂志文章
doi:10.1890/13-0760.1
更新日期:2014-01-01 00:00:00
abstract::The study of how population genetic structure is shaped by attributes of the environment is a central scientific pursuit in ecology and conservation. But limited resources may prohibit landscape genetics studies for many threatened species, particularly given the pace of current environmental change. Understanding the...
journal_title:Ecology
pub_type: 杂志文章
doi:10.1890/14-0490.1
更新日期:2015-05-01 00:00:00
abstract::Direct and indirect effects of predators are highly variable in complex communities, and understanding the sources of this variation is a research priority in community ecology. Recent evidence indicates that herbivore community structure is a primary determinant of predation strength and its cascading impacts on plan...
journal_title:Ecology
pub_type: 杂志文章
doi:10.1002/ecy.1571
更新日期:2016-12-01 00:00:00
abstract::Modern coexistence theory holds that stabilizing mechanisms, whereby species limit the growth of conspecifics more than that of other species, are necessary for species to coexist. Here, we used experimental and observational approaches to assess stabilizing forces in eight locally co-occurring, annual legume species ...
journal_title:Ecology
pub_type: 杂志文章
doi:10.1002/ecy.3290
更新日期:2021-01-23 00:00:00
abstract::Predators exert a strong influence on ecological communities by reducing the abundance of prey (consumptive effects) and shaping their foraging behavior (non-consumptive effects). Although the prevalence of trophic cascades triggered by non-consumptive effects is increasingly recognized in a wide range of ecosystems, ...
journal_title:Ecology
pub_type: 杂志文章
doi:10.1002/ecy.2649
更新日期:2019-05-01 00:00:00
abstract::Abiotic constraints and biotic interactions act simultaneously to shape communities. However, these community assembly mechanisms are often studied independently, which can limit understanding of how they interact to affect species dynamics and distributions. We develop a hierarchical Bayesian neighborhood modeling ap...
journal_title:Ecology
pub_type: 杂志文章
doi:10.1002/ecy.2441
更新日期:2018-10-01 00:00:00