Background and Aims – Biodiversity has long been at the center of ecological research, however there is still no clear understanding of why some species are absent in a given location, although they could be potentially present. This undetectable component of biodiversity is defined as «dark diversity», and its study can provide insights into the missing functions of an ecosystem. Methods – We carried out 47 relevés distributed randomly within a study area of 10 km radius in the province of Varese (Lombardy, Northern Italy), and representative of eight types of broad-leaved deciduous forest vegetation: speciespoor and species-rich acidophilic beech forests (Luzulo-Fagion), basophilic beech forests (Aremonio-Fagion), neutrophilic beech forests (Asperulo-Fagetum), oak and birch forests (Querco-Betuletum s.l.), oak and ash tree forests (Querco-Fraxinetum s.l.), mixed ravine and slope forests (Tilio-Acerion) and mixed recolonization forests (Corylo-Fraxinetalia). For each relief, we calculated the community weighted mean of observed and dark diversity of three plant functional traits (LA, LDMC and SLA) and Grime’s CSR ecological strategies. Results – The highest probability of dark diversity was identified for mixed recolonization forests (mean value = 0.54), while the lowest was evident in both species-poor and speciesrich acidophilic beech forests (mean value = 0.42). In general, dark diversity exhibited a high degree of ruderality (R) as opposed to a selection towards more competitive (C) strategies in the observed diversity (p < 0.001 for both R and C). Conclusions – We hypothesized that the balance of competitiveness and ruderality between observed and dark diversity could be the basis of the properties of broad-leaved forest plant communities respectively linked to resistance and resilience.

Strategie adattive delle piante nella diversità oscura della vegetazione forestale in provincia di Varese (Lombardia) = Plant adaptive strategies in the dark diversity of forest vegetation in the province of Varese (Lombardy) / M. Dalle Fratte, S. Pierce, M. Zanzottera, B.E.L. Cerabolini. - In: BOLLETTINO DELLA SOCIETÀ TICINESE DI SCIENZE NATURALI. - ISSN 0379-1254. - 109:(2021 Mar 27), pp. 235-235. ((Intervento presentato al convegno Congresso Botanica Sudalpina – Botanica Sudalpina Conference tenutosi a Lugano nel 2021.

Strategie adattive delle piante nella diversità oscura della vegetazione forestale in provincia di Varese (Lombardia) = Plant adaptive strategies in the dark diversity of forest vegetation in the province of Varese (Lombardy)

S. Pierce
Secondo
Writing – Review & Editing
;
M. Zanzottera
Penultimo
Writing – Original Draft Preparation
;
2021

Abstract

Background and Aims – Biodiversity has long been at the center of ecological research, however there is still no clear understanding of why some species are absent in a given location, although they could be potentially present. This undetectable component of biodiversity is defined as «dark diversity», and its study can provide insights into the missing functions of an ecosystem. Methods – We carried out 47 relevés distributed randomly within a study area of 10 km radius in the province of Varese (Lombardy, Northern Italy), and representative of eight types of broad-leaved deciduous forest vegetation: speciespoor and species-rich acidophilic beech forests (Luzulo-Fagion), basophilic beech forests (Aremonio-Fagion), neutrophilic beech forests (Asperulo-Fagetum), oak and birch forests (Querco-Betuletum s.l.), oak and ash tree forests (Querco-Fraxinetum s.l.), mixed ravine and slope forests (Tilio-Acerion) and mixed recolonization forests (Corylo-Fraxinetalia). For each relief, we calculated the community weighted mean of observed and dark diversity of three plant functional traits (LA, LDMC and SLA) and Grime’s CSR ecological strategies. Results – The highest probability of dark diversity was identified for mixed recolonization forests (mean value = 0.54), while the lowest was evident in both species-poor and speciesrich acidophilic beech forests (mean value = 0.42). In general, dark diversity exhibited a high degree of ruderality (R) as opposed to a selection towards more competitive (C) strategies in the observed diversity (p < 0.001 for both R and C). Conclusions – We hypothesized that the balance of competitiveness and ruderality between observed and dark diversity could be the basis of the properties of broad-leaved forest plant communities respectively linked to resistance and resilience.
co-occurrence plots; Grime’s CSR theory; hyper geometric; plant functional traits; spec pool; ipergeometrica; plot di co-occorrenza; pool di specie; teoria CSR di Grime; tratti funzionali delle piante;
Settore BIO/03 - Botanica Ambientale e Applicata
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/884215
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