English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Increasing pressure on animal populations through climate change and anthro-pogenic exploitation fuel the need to understand complex life cycle dynamics of key ecosystemspecies and their responses to external factors. Here, we provide a novel, integrative study on thelong-term population dynamics of Pseudocalanus acuspes, a key species in the Baltic Sea, explic-itly considering its distinct life-history stages, and testing for linear, non-linear, and non-additiveclimate and food web effects. Based on a unique data set of stage-specific abundance coveringalmost 5 decades of sampling (1960 to 2008, with 1408 samples), we use generalized additive mod-eling (GAM) and its respective non-additive threshold (TGAM) formulation to test for (1) densityeffects on subsequent life-history stages within the internal life cycle, (2) the effect of exogenousbottom-up (i.e. hydro-climatic) and top-down (i.e. predation) pressures, and (3) changes betweenbottom-up and top-down regulation. We show that linear density effects are always present,explaining a high proportion of interannual variability, while effects of external pressures are non-linear or non-additive and strongly stage- and season-specific. In general, younger stages ofP. acuspesare more affected by atmospheric winter conditions and water temperature, whereasolder stages are influenced by conditions of deepwater salinity and predation pressure. These bot-tom-up processes, however, are not necessarily stable, and can depend on the level of top-downpredation pressure. Our study demonstrates the complex and non-stationary interplay betweeninternal and external factors regulating long-term animal population dynamics.Publicado

Interactions among density, climate, and food web effects determine long-term life cycle dynamics of a key copepod