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Details zur Publikation

Referenztyp Zeitschriften
DOI / URL Link
Titel (primär) Opposing intraspecific vs. interspecific diversity effects on herbivory and growth in subtropical experimental tree assemblages
Autor Hahn, C.Z.; Niklaus, P.A.; Bruelheide, H.; Michalski, S.G.; Shi, M.-M.; Yang, X.; Zeng, X.; Fischer, M.; Durka, W.;
Journal / Serie Journal of Plant Ecology
Erscheinungsjahr 2017
Department BZF; iDiv;
Band/Volume 10
Heft 1
Sprache englisch;
POF III (gesamt) T11;
Keywords BEF-China; species diversity; genetic diversity; growth; herbivory
UFZ Querschnittsthemen RU1;
Abstract

Aims

Positive plant diversity–ecosystem function relations are ultimately driven by variation in functional traits among individuals that form a community. To date, research has largely focused on the role of species diversity for ecosystem functioning. However, substantial intraspecific trait variation is common and a significant part of this variation caused by genetic differences among individuals. Here, we studied the relative importance of species diversity and seed family (SF) diversity within species for growth and herbivory in experimental subtropical tree assemblages.

Methods

In 2010, we set up a field experiment in subtropical China, using four species from the local species pool. Trees were raised from seeds, with seeds from the same mother tree forming an SF. We established 23 plots containing one or four species (species diversity treatment) and one or four SFs per species (SF diversity treatment). Tree growth (stem diameter, plant height and crown expansion) and herbivory (percentage leaf loss due to leaf chewers) were monitored annually from 2011 to 2013.

Important findings

Tree species richness promoted growth but had no effect on herbivory. In contrast, SF diversity reduced growth and increased herbivory but only so in species mixtures. Most of the observed effects were time dependent, with the largest effect found in 2013. Our results suggest that biodiversity can affect plant performance directly via tree species–species interactions, or context dependent, via potential effects on inter-trophic interactions. Two important conclusions should be drawn from our findings. Firstly, in future studies regarding biodiversity and ecosystem functioning (BEF) relationships, intraspecific genetic diversity should be given similar weight as species diversity as it has often been neglected and its effects are not well understood. Secondly, we demonstrate opposite effects of biodiversity among and within species, stressing the importance to consider the effects of multiple levels of biodiversity simultaneously.

ID 18401
dauerhafte UFZ-Verlinkung https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=18401
Hahn, C.Z., Niklaus, P.A., Bruelheide, H., Michalski, S.G., Shi, M.-M., Yang, X., Zeng, X., Fischer, M., Durka, W. (2017):
Opposing intraspecific vs. interspecific diversity effects on herbivory and growth in subtropical experimental tree assemblages
J. Plant Ecol. 10 (1), 242 - 251