Poster De Conférence Année : 2024

Litter decomposition in ponds across a large latitudinal gradient

Résumé

Ponds play an important role in the processing and decomposition of plant litter from both allochthonous and autochthonous sources, which in turn contribute to the global carbon cycle. The aim of the present study was to quantify microbial litter decomposition in ponds located along a large latitudinal gradient in an effort to predict changes in litter decomposition as a response to global change. For this purpose, we quantified the potential decomposition rate in 250 ponds located in eight countries (Belgium, France, Germany, Spain, Switzerland, Turkey, United Kingdom and Uruguay) along a gradient of land use intensity using the Tea Bag Index (TBI) approach. Selected ponds included permanent and intermittent ponds. We found lower potential decomposition rates in lower impacted ponds but the stabilization factor (indicator of the inhibiting effect of environmental conditions on the decomposition of the labile fraction) was not affected by land use intensity. Moreover, we found differences among pond hydroperiod for the stabilization factor, but not for the potential decomposition rates. Latitude had positive and negative effects on the potential decomposition rate and the stabilization factor, respectively. The observed unexpected latitudinal pattern could be explained by the specific latitudinal range included (within the temperate zone), where probably other local factors such as organic matter and nutrient input to the pond may play a major role. Our work contributes to the assessment of global organic matter decomposition across large geographical areas, which is key to understanding the effects of anthropogenic stress and climate change on these ecosystems.

Domaines

Ecosystèmes
Fichier principal
Vignette du fichier
Martín_etal_AIL-Vigo2024.pdf (4.28 Mo) Télécharger le fichier
Origine Fichiers produits par l'(les) auteur(s)
Licence

Dates et versions

hal-04865484 , version 1 (06-01-2025)

Licence

Identifiants

Citer

Luis Martin, Ada Pastor, Maria Cuenca-Cambronero, Maria Anton‐pardo, Maite Colina, et al.. Litter decomposition in ponds across a large latitudinal gradient. XXII Congress of the Iberian Association of Limnology, Jun 2024, Vigo, Spain. 2024, ⟨10.5281/zenodo.14540970⟩. ⟨hal-04865484⟩

Collections

ISARA
0 Consultations
0 Téléchargements

Altmetric

Partager

More