Fire frequency shapes diversity in multi‐guild communities through direct and indirect pathways DOI
Julia Tavella, Lucas M. Carbone, Adriana Salvo

et al.

Insect Conservation and Diversity, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 18, 2024

Abstract Human‐induced changes in fire regimes worldwide are leading to the diversity and composition of plant insect communities through alterations vegetation habitat characteristics. As species interact complex networks, environmental disturbances, such as an increase frequency, can affect directly indirectly cascading effects across trophic levels. This study examines frequency on multi‐guild Chaco region Argentina, aiming disentangle direct indirect pathways influence between five different groups: plants, phytophagous insects, ants, predators, parasitoids. We assess cross‐taxon congruence by analysing α β indices performing a structural equation model Procrustes tests, respectively, trying elucidate guilds. Multi‐guild responded produced via effects. Fire has both negative positive, but weak predator richness bottom‐up effect from insects ants. However, when relative abundances were considered, no have been observed Shannon Simpson indices. A positive correlation guilds indicated connected suggesting that beta propagate all chains. Given posed translated pronounced Our findings emphasise importance approach understanding biodiversity responses changes, highlighting complexity intricate dynamics ecological fire‐prone ecosystems.

Language: Английский

Plant sexual reproduction is influenced by fire frequency: evidence from a resprouting herb in Chaco ecosystems DOI Open Access

M. L. Tosatto,

Ramiro Aguilar, Lucas M. Carbone

et al.

Plant Biology, Journal Year: 2025, Volume and Issue: unknown

Published: March 17, 2025

Abstract Reduced competition and increased availability of abiotic resources shortly after a fire can favour growth flowering herbaceous species. These changes may also affect the pollinator community, reproductive success, and, potentially, characteristics progeny. However, anthropogenic increases in frequency fires could reverse beneficial effects fire. We evaluate effect on sexual expression, pollination, female early progeny vigour Solanum palinacanthum, an andromonoecious resprouting herb South American Chaco ecosystems. Measurements were performed at six sites along gradient frequency, ranging from 0 to 5 over 22 years. found that plant size proportion hermaphrodite (relative male) flowers intermediate (twice burned) compared unburned sites, but both declined high‐fire sites. Pollinator visits more frequent plants area with frequency. Although did not enhance probability fruit set, it total number site burned twice. Seeds had higher mass germination rates. Soil maternal environmental shaped by play key role reproduction S. palinacanthum . Nonetheless, due human activities override reproduction.

Language: Английский

Citations

0
Fire frequency shapes diversity in multi‐guild communities through direct and indirect pathways DOI
Julia Tavella, Lucas M. Carbone, Adriana Salvo

et al.

Insect Conservation and Diversity, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 18, 2024

Abstract Human‐induced changes in fire regimes worldwide are leading to the diversity and composition of plant insect communities through alterations vegetation habitat characteristics. As species interact complex networks, environmental disturbances, such as an increase frequency, can affect directly indirectly cascading effects across trophic levels. This study examines frequency on multi‐guild Chaco region Argentina, aiming disentangle direct indirect pathways influence between five different groups: plants, phytophagous insects, ants, predators, parasitoids. We assess cross‐taxon congruence by analysing α β indices performing a structural equation model Procrustes tests, respectively, trying elucidate guilds. Multi‐guild responded produced via effects. Fire has both negative positive, but weak predator richness bottom‐up effect from insects ants. However, when relative abundances were considered, no have been observed Shannon Simpson indices. A positive correlation guilds indicated connected suggesting that beta propagate all chains. Given posed translated pronounced Our findings emphasise importance approach understanding biodiversity responses changes, highlighting complexity intricate dynamics ecological fire‐prone ecosystems.

Language: Английский

Citations

0