Rapid post-fire re-assembly of species-rich bryophyte communities in Afroalpine heathlands

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Hylander, KristofferStockholms universitet,Institutionen för ekologi, miljö och botanik (författare)

Rapid post-fire re-assembly of species-rich bryophyte communities in Afroalpine heathlands

Artikel/kapitelEngelska2021

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2021-05-18
Wiley,2021
printrdacarrier

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LIBRIS-ID:oai:DiVA.org:su-196352
https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-196352URI
https://doi.org/10.1111/jvs.13033DOI

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Språk:engelska
Sammanfattning på:engelska

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Ämneskategori:art swepub-publicationtype

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Questions In some fire-prone ecosystems, bryophytes play a crucial role by providing the surface fuel that controls the fire return interval. Afroalpine heathlands are such an ecosystem, yet almost nothing is known about the bryophytes in this system. We do not know the level of species richness, or if there is a successive accumulation of species over time, or if some species are adapted to specific phases along the successional gradient, for example early-successional species sensitive to competition. Location Afroalpine heathlands in Ethiopia. Methods We made an inventory of all bryophytes in 48 plots of 5 m x 5 m, distributed along a chronosequence from 1 to 25 years post fire. The heathlands are located between 3500 m and 3800 m a.s.l. and are managed by traditional pasture burning with fire intervals of 8-20 years. Results We found in total 111 taxa of bryophytes. Post-fire mortality was almost 100%. The youngest plots had only a few cosmopolitan species often found after fire. Initially, species richness increased monotonically while starting to level off around 15 years after fire, when many plots had around 30 species and a high cover of Breutelia diffracta, which is a key ground-living species, important as surface fuel. Most species were found with sporophytes, a pattern even stronger for the most frequent species. Conclusions Interestingly, bryophyte diversity is already remarkably high by only 15 years after total eradication. The relatively slow accumulation of species in the first years after fire suggests that dispersal in space, and not time, is the major mechanism by which sites regain their diversity (i.e. spore banks play a smaller role than colonization of wind-borne spores). This indicates that the high species richness is built up through colonization from surrounding heathlands, and perhaps also from higher-altitude alpine grasslands and lower-altitude forests, and that the bryophyte diversity in this system is maintained by the traditional fire and grazing management.

Ämnesord och genrebeteckningar

NATURVETENSKAP Biologi hsv//swe
NATURAL SCIENCES Biological Sciences hsv//eng
chronosequence
colonization
disturbance
Ethiopia
liverwort
moss
species assembly
succession

Biuppslag (personer, institutioner, konferenser, titlar ...)

Frisk, Carl Alexander (författare)
Nemomissa, Sileshi (författare)
Johansson, Maria UlrikaStockholms universitet,Institutionen för ekologi, miljö och botanik(Swepub:su)majo7519 (författare)
Stockholms universitetInstitutionen för ekologi, miljö och botanik (creator_code:org_t)

Sammanhörande titlar

Ingår i:Journal of Vegetation Science: Wiley32:31100-92331654-1103

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NATURVETENSKAP: NATURVETENSKAP; och Biologi

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Av lärosätet: Stockholms universitet

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