Research output: Contribution to journal › Article › peer-review
Drastic turnover of Bryophyte vegetation on bog microforms initiated by air pollution in Northeastern Estonia and bordering Russia. / Vellak, Kai; Liira, Jaan; Karofeld, Edgar; Galanina, Olga; Noskova, Maria; Paal, Janus.
In: Wetlands, Vol. 34, No. 6, 2014, p. 1097-1108.Research output: Contribution to journal › Article › peer-review
}
TY - JOUR
T1 - Drastic turnover of Bryophyte vegetation on bog microforms initiated by air pollution in Northeastern Estonia and bordering Russia
AU - Vellak, Kai
AU - Liira, Jaan
AU - Karofeld, Edgar
AU - Galanina, Olga
AU - Noskova, Maria
AU - Paal, Janus
PY - 2014
Y1 - 2014
N2 - Human influence on bogs, including air pollution, causes changes in vegetation leading to the degradation of an ombrotrophic bog ecosystem into a more uniform transitional mire-like system. We have hypothesized that intensive atmospheric alkaline pollution will cause an increase in water pH and convergence of bryophyte species composition among microforms. We also expected that bog-specific acidophilic species will be replaced by species indigenous to neutral pH habitats. Through GLM and DCA analyses, we found that although natural acidic bogs are more species poor than polluted bogs, the increase in pH can lead to a decrease in bogspecific vegetation. In polluted bogs, the species composition in different bog microforms will become similar; in particular bog-specific Sphagnum mosses will be increasingly replaced by more tolerant brown mosses, particularly in lawns.
AB - Human influence on bogs, including air pollution, causes changes in vegetation leading to the degradation of an ombrotrophic bog ecosystem into a more uniform transitional mire-like system. We have hypothesized that intensive atmospheric alkaline pollution will cause an increase in water pH and convergence of bryophyte species composition among microforms. We also expected that bog-specific acidophilic species will be replaced by species indigenous to neutral pH habitats. Through GLM and DCA analyses, we found that although natural acidic bogs are more species poor than polluted bogs, the increase in pH can lead to a decrease in bogspecific vegetation. In polluted bogs, the species composition in different bog microforms will become similar; in particular bog-specific Sphagnum mosses will be increasingly replaced by more tolerant brown mosses, particularly in lawns.
KW - Alkaline input
KW - Characteristic species
KW - Microtopography
KW - Raised bogs
U2 - DOI 10.1007/s13157-014-0569-3
DO - DOI 10.1007/s13157-014-0569-3
M3 - Article
VL - 34
SP - 1097
EP - 1108
JO - Wetlands
JF - Wetlands
SN - 0277-5212
IS - 6
ER -
ID: 5717111