The influence of canopy-layer composition on understory plant diversity in southern temperate forestsReport as inadecuate




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Forest Ecosystems

, 4:6

First Online: 17 May 2017Received: 29 September 2016Accepted: 10 May 2017DOI: 10.1186-s40663-017-0093-z

Cite this article as: Mestre, L., Toro-Manríquez, M., Soler, R. et al. For. Ecosyst. 2017 4: 6. doi:10.1186-s40663-017-0093-z

Abstract

BackgroundUnderstory plants represents the largest component of biodiversity in most forest ecosystems and plays a key role in forest functioning. Despite their importance, the influence of overstory-layer composition on understory plant diversity is relatively poorly understood within deciduous-evergreen broadleaved mixed forests. The aim of this work was to evaluate how tree overstory-layer composition influences on understory-layer diversity in three forest types monospecific deciduous Nothofagus pumilio Np, monospecific evergreen Nothofagus betuloides Nb, and mixed N. pumilio-N. betuloides M forests, comparing also between two geographical locations coast and mountain to estimate differences at landscape level.

ResultsWe recorded 46 plant species: 4 ferns, 12 monocots, and 30 dicots. Canopy-layer composition influences the herb-layer structure and diversity in two different ways: while mixed forests have greater similarity to evergreen forests in the understory structural features, deciduous and mixed were similar in terms of the specific composition of plant assemblage. Deciduous pure stands were the most diverse, meanwhile evergreen stands were least diverse. Lack of exclusive species of mixed forest could represent a transition where evergreen and deciduous communities meet and integrate. Moreover, landscape has a major influence on the structure, diversity and richness of understory vegetation of pure and mixed forests likely associated to the magnitude and frequency of natural disturbances, where mountain forest not only had highest herb-layer diversity but also more exclusive species.

ConclusionsOur study suggests that mixed Nothofagus forest supports coexistence of both pure deciduous and pure evergreen understory plant species and different assemblages in coastal and mountain sites. Maintaining the mixture of canopy patch types within mixed stands will be important for conserving the natural patterns of understory plant composition in southern beech mixed forests.

KeywordsLandscape Understory communities Understory structure Forest structure Nothofagus Conservation Electronic supplementary materialThe online version of this article doi:10.1186-s40663-017-0093-z contains supplementary material, which is available to authorized users.





Author: Luciana Mestre - Mónica Toro-Manríquez - Rosina Soler - Alejandro Huertas-Herrera - Guillermo Martínez-Pastur - María Va

Source: https://link.springer.com/



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