Diversity and specialization responses to climate and land use differ between deadwood fungi and bacteria

verfasst von

Jana Englmeier, Daniel Rieker, Oliver Mitesser, Caryl Benjamin, Ute Fricke, Cristina Ganuza, Maria Haensel, Harald Kellner, Janina Lorz, Sarah Redlich, Rebekka Riebl, Sandra Rojas-Botero, Thomas Rummler, Ingolf Steffan-Dewenter, Elisa Stengel, Cynthia Tobisch, Johannes Uhler, Lars Uphus, Jie Zhang, Jörg Müller, Claus Bässler

Abstract

Climate and land use are major determinants of biodiversity, and declines in species richness in cold and human exploited landscapes can be caused by lower rates of biotic interactions. Deadwood fungi and bacteria interact strongly with their hosts due to long-lasting evolutionary trajectories. However, how rates of biotic interactions (specialization) change with temperature and land-use intensity are unknown for both microbial groups. We hypothesize a decrease in species richness and specialization of communities with decreasing temperature and increasing land use intensity while controlling for precipitation. We used a full-factorial nested design to disentangle land use at habitat and landscape scale and temperature spanning an area of 300 × 300 km in Germany. We exposed four deadwood objects representing the main tree species in Central Europe (beech, oak, spruce, pine) in 175 study plots. Overall, we found that fungal and bacterial richness, community composition and specialization were weakly related to temperature and land use. Fungal richness was slightly higher in near-natural than in urban landscapes. Bacterial richness was positively associated with mean annual temperature, negatively associated with local temperature and highest in grassland habitats. Bacterial richness was positively related to the covariate mean annual precipitation. We found strong effects of host-tree identity on species richness and community composition. A generally high level of fungal host-tree specialization might explain the weak response to temperature and land use. Effects of host-tree identity and specialization were more pronounced in fungi. We suggest that host tree changes caused by land use and climate change will be more important for fungal communities, while changes in climate will affect bacterial communities more directly. Contrasting responses of the two taxonomic groups suggest a reorganization of deadwood microbial communities, which might have further consequences on diversity and decomposition in the Anthropocene.

Organisationseinheit(en)

Institut für Geobotanik

Externe Organisation(en)

Julius-Maximilians-Universität Würzburg
Technische Universität Dresden
Goethe-Universität Frankfurt am Main
Technische Universität München (TUM)
Universität Bayreuth
Universität Augsburg
Nationalparkverwaltung Bayerischer Wald
Hochschule Weihenstephan-Triesdorf
Julius Kühn-Institut (JKI) Bundesforschungsinstitut für Kulturpflanzen

Typ

Artikel

Journal

ECOGRAPHY

Band

2023

Anzahl der Seiten

12

ISSN

0906-7590

Publikationsdatum

02.11.2023

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Ökologie, Evolution, Verhaltenswissenschaften und Systematik

Ziele für nachhaltige Entwicklung

SDG 13 – Klimaschutzmaßnahmen, SDG 15 – Lebensraum Land

Elektronische Version(en)

https://doi.org/10.1111/ecog.06807 (Zugang: Offen)