Buffering and phenological mismatch: A change of perspective

Global Change Biology, Journal Year: 2024, Volume and Issue: 30(5)

Published: May 1, 2024

Abstract The potential for climate change to disrupt phenology‐mediated interactions in interaction networks has attracted considerable attention recent decades. Frequently, studies emphasize the fragility of ephemeral seasonal interactions, and risks posed by phenological asynchrony. Here, we argue that fitness consequences asynchrony may often be more buffered than is typically acknowledged. We identify three main forms buffering take: (i) mechanisms reduce between consumer resource; (ii) costs being asynchronous; (iii) dampen interannual variance performance across higher organizational units. Using synchrony hatching winter moth caterpillars leafing their host‐plants as a case study, wide variety buffers detrimental on caterpillar individuals, populations, meta‐populations. follow this drawing examples breadth taxa, demonstrate these quite general. conclude identifying key gaps our knowledge demographic buffering, context mismatch. Buffering substantially alter understanding biotic impacts future change—a greater recognition contribution reveal many trophic are surprisingly resilient, also serve shift research emphasis those systems with fewer towards limits buffers.

Language: Английский

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Variation in Salmon Migration Phenology Bolsters Population Stability but Is Threatened by Drought

Ecology Letters, Journal Year: 2025, Volume and Issue: 28(2)

Published: Feb. 1, 2025

ABSTRACT Intrapopulation variation in movement is common nature but its effects on population dynamics are poorly understood. Using data from 3270 individually‐marked fish representing nine cohorts of coho salmon ( Oncorhynchus kisutch ) California, we show that bimodal intrapopulation the timing juvenile down‐migration their natal habitat and subsequent residence non‐natal affects growth, emigration timing, abundance stability adult returns. Non‐natal (early down‐migrants) exhibited more variable growth earlier to estuary than (late down‐migrants). While rearing was common, were overrepresented among returns, total returns 1.4 times stable alone. Our results demonstrate migratory behaviour bolsters stability. However, reduced low water years, suggesting drought exacerbates instability by reducing critical variation.

Language: Английский

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Living in the edge: demographic responses driven by density‐dependence and pulsed resources in a hibernating mammal

Ecography, Journal Year: 2025, Volume and Issue: unknown

Published: April 21, 2025

Populations at the edge of a species' distribution often encounter more challenging environmental conditions than those core, requiring unique adaptations and strategies. However, demographic processes driving these populations remain poorly understood. This study aims to understand population stability hibernating edible dormouse under in two Iberian populations: Montseny Montnegre. Despite their geographic proximity, Montnegre is demographically isolated faces harsher environment characterized by drier climate forests with lower deciduous tree diversity, whereas remains connected other populations. Using long‐term capture–recapture data, we analyzed effects density‐dependence seed availability on growth, survival, recruitment dormice. Results indicated that both experienced large fluctuations growth rate, slight mean decline. Survival fluctuated less was higher Montnegre, likely reflecting latter. We found negative relationship between size rate survival especially suggesting significant density‐dependent varied stochastic annual abundance. influenced pulsed acorn production Contrarily, high asynchrony beechnut abundance dampened dynamics availability. Interestingly, contribution dominated When comparing rates Central European core populations, decreased increasing climatic aridity, but unrelated proximity underscoring role spatial heterogeneity habitat suitability, independent range position. Our findings emphasize complex interplay ecological evolutionary mechanisms range, highlighting critical local resource shaping dynamics.

Language: Английский

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Criteria for buffering in ecological modeling

Trends in Ecology & Evolution, Journal Year: 2023, Volume and Issue: unknown

Published: Dec. 1, 2023

Language: Английский

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Aligning spatial ecological theory with the study of clonal organisms: the case of fungal coexistence

Biological reviews/Biological reviews of the Cambridge Philosophical Society, Journal Year: 2024, Volume and Issue: 99(6), P. 2211 - 2233

Published: July 29, 2024

ABSTRACT Established ecological theory has focused on unitary organisms, and thus its concepts have matured into a form that often hinders rather than facilitates the study of modular organisms. Here, we use example filamentous fungi to develop enable integration non‐unitary (modular) organisms established community ecology theory, with particular focus spatial aspects. In doing so, provide link between fungal modern coexistence (MCT). We first show how processes predictions made by MCT can be used define meaningful scales in ecology. This leads novel concept unit interactions (UCI), promising conceptual tool for applying communities indeterminate clonal growth hierarchical individuality. outline plausible mechanisms structuring communities, at what habitats they are most likely act. end describing challenges opportunities empirical theoretical research competitive coexistence.

Language: Английский

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Rare events, ecological dynamics, and the importance of long-term demographic studies

Authorea (Authorea), Journal Year: 2024, Volume and Issue: unknown

Published: April 12, 2024

While multiple reasons make long-term demographic studies disproportionally valuable, much of their importance comes from the ability to detect and quantify rare events. We argue here that events can be critical for understanding important ecological evolutionary processes. highlight additive or interactive nature anthropogenic with environmental may cause outsized changes in vital rates therefore population dynamics. Rare also generate complex responses populations due interactions between processes responses. Complex, non-linear dynamics include threshold, extreme such as long transients, tipping points, regime shifts collapse. When occurring locally, exacerbate spatial heterogeneity consequences In sum, these effects represent substantial challenges prediction, especially when considering increase frequency events, emphasise need studies. Our perspective attempts integrate occurrence variable environments overall fitness, growth rates, spatial-temporal populations.

Language: Английский

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Assessing total mortality following seabird wrecks given variable data quantity and quality: the Cassin’s auklet die-off

Canadian Journal of Fisheries and Aquatic Sciences, Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 24, 2024

Mass mortality events (MMEs) of seabirds are becoming more frequent as the global climate warms. Often documented via beached bird surveys, methods for estimating event-wide needed that can accommodate regional differences in carcass deposition and data quality/quantity. We develop a framework from counts, extending existing approaches through novel application ocean circulation modeling to assess beaching likelihood. applied our 2014/15 Cassin’s auklet ( Ptychoramphus aleuticus) MME, which spread across three regions (central California, northern California-through-Washington, British Columbia) with varying Our best estimate ∼400 000 (estimates ranged 265 700 depending on model uncertainty extent) places this seabird MME one largest record. However, we caution much exists surrounding parameterization Columbia where were sparse. suggest models, combined process-based persistence detection, improve estimates magnitude.

Language: Английский

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Defining ecological buffer mechanisms should consider diverse approaches

Trends in Ecology & Evolution, Journal Year: 2023, Volume and Issue: 39(2), P. 119 - 120

Published: Dec. 28, 2023

Language: Английский

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