Nitrogen fixation associated with two cohabiting moss species expresses different patterns under Cu and Zn contamination
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Nitrogen fixation associated with two cohabiting moss species expresses different patterns under Cu and Zn contamination. / Sjøgren, Toke Due; Wang, Yinliu; Rousk, Kathrin.
In: Environmental Science and Pollution Research, Vol. 30, 2023, p. 85701-85707.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Nitrogen fixation associated with two cohabiting moss species expresses different patterns under Cu and Zn contamination
AU - Sjøgren, Toke Due
AU - Wang, Yinliu
AU - Rousk, Kathrin
N1 - Publisher Copyright: © 2023, The Author(s).
PY - 2023
Y1 - 2023
N2 - Nitrogen (N2) fixation by moss-associated cyanobacteria is an important N source in pristine ecosystems. Previous studies have shown that moss-associated N2 fixation is sensitive to anthropogenic N pollution. However, we still lack understanding of the effects of other factors derived from anthropogenic sources, such as heavy metal pollution on N2 fixation. To test this, we collected two dominant mosses (Pleurozium schreberi and Spaghnum palustre) from a temperate bog in Denmark and assessed their N2 fixation responses to simulated heavy metal pollution by adding 5 levels (plus a control) of copper (Cu, 0–0.05 mg g dw−1) and zinc (Zn, 0–0.1 mg g dw−1). Metal concentrations in both mosses increased linearly with Cu and Zn addition, but N2 fixation activity associated with S. palustre was to a greater extent negatively affected by both Cu and Zn additions than that associated with P. schreberi. Copper additions even promoted N2 fixation in P. schreberi. Hence, the heavy metal sensitivity of N2-fixing cyanobacteria is dependent on the host moss-species, and the vulnerability of ecosystems towards heavy metal pollution could vary depending on the dominant moss species.
AB - Nitrogen (N2) fixation by moss-associated cyanobacteria is an important N source in pristine ecosystems. Previous studies have shown that moss-associated N2 fixation is sensitive to anthropogenic N pollution. However, we still lack understanding of the effects of other factors derived from anthropogenic sources, such as heavy metal pollution on N2 fixation. To test this, we collected two dominant mosses (Pleurozium schreberi and Spaghnum palustre) from a temperate bog in Denmark and assessed their N2 fixation responses to simulated heavy metal pollution by adding 5 levels (plus a control) of copper (Cu, 0–0.05 mg g dw−1) and zinc (Zn, 0–0.1 mg g dw−1). Metal concentrations in both mosses increased linearly with Cu and Zn addition, but N2 fixation activity associated with S. palustre was to a greater extent negatively affected by both Cu and Zn additions than that associated with P. schreberi. Copper additions even promoted N2 fixation in P. schreberi. Hence, the heavy metal sensitivity of N2-fixing cyanobacteria is dependent on the host moss-species, and the vulnerability of ecosystems towards heavy metal pollution could vary depending on the dominant moss species.
KW - Bryophytes
KW - Cyanobacteria
KW - Heavy metal pollution
KW - Nitrogen fixation
KW - Sphagnum
U2 - 10.1007/s11356-023-28404-0
DO - 10.1007/s11356-023-28404-0
M3 - Journal article
C2 - 37393213
AN - SCOPUS:85163706799
VL - 30
SP - 85701
EP - 85707
JO - Environmental Science and Pollution Research
JF - Environmental Science and Pollution Research
SN - 0944-1344
ER -
ID: 360249158