Species-specific loss of genetic diversity and accumulation of genetic load following agricultural intensification

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 10, 2024

Abstract Agriculture driven land-use change is a major contributor to insect declines globally. As result of population decline and subdivision, species lose genetic diversity, potentially reducing adaptive potential increasing load, reinforcing decline. We examine how diversity has changed over the past century in three Polyommatinae (Lepidoptera: Lycaenidae) butterfly southern Sweden, leveraging genome sequencing specimens from museum collections. Based on 63 historical 92 contemporary genomes, we document general reveal that extent depends habitat specialization. The generalist retained most its connectivity. In contrast, two specialists have declined sufficiently even common variation being eroded by drift, with up 3.3% reduction heterozygosity per decade strongly grassland associated Cyaniris semiargus . While this sharp reduced total load specialist species, increased isolation led inbreeding Cy. , exposing greater proportion homozygous state. This realized likely reduces mean fitness reinforces decline, highlighting need for well-connected landscapes maintain functional connectivity diversity. complement these analyses data seven additional uncovering are across group, alarming rates listed as viable. study highlights urgency incorporating into conservation planning, threats erosion not captured current assessment.

Language: Английский

Data-driven identification of high-nature value grasslands using Harmonized Landsat Sentinel-2 time series data

Remote Sensing Applications Society and Environment, Journal Year: 2024, Volume and Issue: unknown, P. 101427 - 101427

Published: Dec. 1, 2024

Language: Английский

Altitudinal Distributions of Endangered Butterflies in the Austrian Alps

Published: Jan. 1, 2024

Language: Английский