Complex relationships between beta diversity and dispersal in meta‐community models

Ecography, Journal Year: 2021, Volume and Issue: 44(12), P. 1769 - 1780

Published: Oct. 12, 2021

Dispersal is one of the most important drivers community assembly. Understanding how dispersal impacts spatial variations in composition (beta diversity) crucial for predicting biodiversity change during Anthropocene. Classic theories and a large amount empirical evidence have led to common belief that increasing rate should lead regional homogenization (lower beta diversity). However, recent studies show can also divergence when interacting with other processes such as disturbance priority effect. The underappreciation complex relationship between diversity might impede our ability make accurate ecological forecasts. To address this concern, I examine diversity–dispersal through extinction colonization dynamics meta‐community models. find wide range relationships (e.g. negative, positive, hump‐shaped) be generated by changes species‐level occurrence probabilities meta‐population (rather than mainland–island dispersal), strong biotic interactions are at play. Specifically, reducing variance leads mean probability homogenization; positive or hump‐shaped emerges effect decreasing stronger mean. These findings highlight intrinsic constraint occupancy stochasticity on echo call more realistic manipulations stochastic detailed understanding interaction networks test various future studies.

Language: Английский

---

Disentangling Niche Theory and Beta Diversity Change

The American Naturalist, Journal Year: 2021, Volume and Issue: 199(4), P. 510 - 522

Published: Dec. 17, 2021

AbstractBeta diversity describes the differences in species composition among communities. Changes beta over time are thought to be due selection based on species' niche characteristics. For example, theory predicts that favors habitat specialists will increase diversity. In practice, ecologists struggle predict how changes. To remedy this problem, we propose a novel solution formally measures selection's effects Using Price equation, show change can partitioned into fundamental mechanisms including species, variable communities, drift, and immigration. A key finding of our approach is short-term impact cannot predicted using information its long-term environmental requirements (i.e., niche). We illustrate used partition causes montane tropical forest before after an intense hurricane. Previous work system highlighted resistance recruitment light-demanding but was unable quantify importance these approach, changes were consistent with ecological drift. use results highlight opportunities presented by synthesis formal models selection.

Language: Английский

---

Partitioning the temporal changes in abundance‐based beta diversity into loss and gain components

Methods in Ecology and Evolution, Journal Year: 2022, Volume and Issue: 13(9), P. 2042 - 2048

Published: June 18, 2022

Abstract Ecologists have long recognized that the losses and gains in local species abundances can either decrease or increase spatial beta diversity, phenomena often referred to as biotic homogenization differentiation, respectively. However, quantifying such dynamic impacts of on diversity has remained a methodological challenge. Here, we develop numerical method additively partition temporal changes into distinct components reflect abundances. Our is based Ružička Bray–Curtis indices normalized abundance‐based Whittaker's diversity. The these measures are partitioned represent differentiation driven by abundance at both community levels. Application Swedish fish dataset revealed decreases between 1990 2018. communities was explained gains, but not losses, across sites. Species‐level partitioning further showed largely caused increased population sizes particular sites where it already present. results highlight our effectively identifies processes embedded regional biodiversity patterns. We believe explicit analyses should bring deeper insights dynamics

Language: Английский

---

Beta diversity of freshwater algal communities: influence of different dispersal mechanisms

Aquatic Sciences, Journal Year: 2024, Volume and Issue: 86(2)

Published: Jan. 11, 2024

Language: Английский

---

Convergence effect during spatiotemporal succession of lacustrine plastisphere: loss of priority effects and turnover of microbial species

ISME Communications, Journal Year: 2024, Volume and Issue: 4(1)

Published: Jan. 1, 2024

Succession is a fundamental aspect of ecological theory, but studies on temporal succession trajectories and driving mechanisms plastisphere microbial communities across diverse colonization environments remain scarce poorly understood. To fill this knowledge gap, we assessed the primary colonizers, trajectories, assembly, turnover prokaryotes eukaryotes from four freshwater lakes. Our results show that differences in composition similarity, rate, assembly processes do not exclusively occur at kingdom level (prokaryotes eukaryotes), also depend environmental conditions time. Thereby, time has stronger impact community than eukaryotes, whereas for conditions, opposite pattern holds true. Across all lakes, deterministic shaped prokaryotes, stochastic influenced eukaryotes. Yet, they share similar throughout succession: species over causes loss any priority effect, which leads to convergent communities. The increase diversity different kingdoms during potentially stability entire related biogeochemical cycles. Therefore, research needs integrate dynamics along with spatial turnovers microbiome. Taking heterogeneity global lakes climate patterns into account, highlight urgency investigate spatiotemporal mechanism more around world.

Language: Английский

---