Disturbance type determines how connectivity shapes ecosystem resilience.

Abstract:

:Connectivity is fundamentally important for shaping the resilience of complex human and natural networks when systems are disturbed. Ecosystem resilience is, in part, shaped by the spatial arrangement of habitats, the permeability and fluxes between them, the stabilising functions performed by organisms, their dispersal traits, and the interactions between functions and stressor types. Controlled investigations of the relationships between these phenomena under multiple stressors are sparse, possibly due to logistic and ethical difficulties associated with applying and controlling stressors at landscape scales. Here we show that grazing performance, a key ecosystem function, is linked to connectivity by manipulating the spatial configuration of habitats in microcosms impacted by multiple stressors. Greater connectivity enhanced ecosystem function and reduced variability in grazing performance in unperturbed systems. Improved functional performance was observed in better connected systems stressed by harvesting pressure and temperature rise, but this effect was notably reversed by the spread of disease. Connectivity has complex effects on ecological functions and resilience, and the nuances should be recognised more fully in ecosystem conservation.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Pearson RM,Schlacher TA,Jinks KI,Olds AD,Brown CJ,Connolly RM

doi

10.1038/s41598-021-80987-1

subject

Has Abstract

pub_date

2021-01-13 00:00:00

pages

1188

issue

1

issn

2045-2322

pii

10.1038/s41598-021-80987-1

journal_volume

11

pub_type

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