caa a22 4500 605516952 CHVBK 20210128100717.0 cr unu---uuuuu 210128e20150201xx s 000 0 eng 10.1007/s10533-014-0042-7 doi (NATIONALLICENCE)springer-10.1007/s10533-014-0042-7 Lichen response to ammonia deposition defines the footprint of a penguin rookery [Elektronische Daten] [P. Crittenden, C. Scrimgeour, G. Minnullina, M. Sutton, Y. Tang, M. Theobald] Ammonia volatilized from penguin rookeries is a major nitrogen source in Antarctic coastal terrestrial ecosystems. However, the spatial extent of ammonia dispersion from rookeries and its impacts have not been quantified previously. We measured ammonia concentration in air and lichen ecophysiological response variables proximate to an Adèlie penguin rookery at Cape Hallett, northern Victoria Land. Ammonia emitted from the rookery was 15N-enriched (δ15N value +6.9) and concentrations in air ranged from 36-75µgm−3 at the rookery centre to 0.05µgm−3 at a distance of 15.3km. δ15N values and rates of phosphomonoesterase (PME) activity in the lichens Usnea sphacelata and Umbilicaria decussata were strongly negatively related to distance from the rookery and PME activity was positively related to thallus N:P mass ratio. In contrast, the lichen Xanthomendoza borealis, which is largely restricted to within an area 0.5km from the rookery perimeter, had high N, P and 15N concentrations but low PME activity suggesting that nutrient scavenging capacity is suppressed in highly eutrophicated sites. An ammonia dispersion model indicates that ammonia concentrations sufficient to significantly elevate PME activity and δ15N values (≥0.1µg NH3 m−3) occurred over c. 40-300km2 surrounding the rookery suggesting that penguin rookeries potentially can generate large spatial impact zones. In a general linear model NH3 concentration and lichen species identity were found to account for 72% of variation in the putative proportion of lichen thallus N originating from penguin derived NH3. The results provide evidence of large scale impact of N transfer from a marine to an N-limited terrestrial ecosystem. The Author(s), 2014 Adèlie penguins nationallicence 15N natural abundance nationallicence Phosphatase activity nationallicence Umbilicaria decussata nationallicence Usnea sphacelata nationallicence Xanthomendoza borealis nationallicence Crittenden P. School of Life Sciences, University of Nottingham, NG7 2RD, Nottingham, UK aut Scrimgeour C. James Hutton Institute, Invergowrie, DD2 5DA, Dundee, UK aut Minnullina G. School of Life Sciences, University of Nottingham, NG7 2RD, Nottingham, UK aut Sutton M. Centre for Ecology and Hydrology, EH26 0QB, Penicuik, UK aut Tang Y. Centre for Ecology and Hydrology, EH26 0QB, Penicuik, UK aut Theobald M. E.T.S.I Agrónomos, Technical University of Madrid, 28040, Madrid, Spain aut Biogeochemistry Springer International Publishing 122/2-3(2015-02-01), 295-311 0168-2563 122:2-3<295 2015 122 10533 https://doi.org/10.1007/s10533-014-0042-7 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10533-014-0042-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Crittenden P. School of Life Sciences, University of Nottingham, NG7 2RD, Nottingham, UK aut NATIONALLICENCE 700 1- Scrimgeour C. James Hutton Institute, Invergowrie, DD2 5DA, Dundee, UK aut NATIONALLICENCE 700 1- Minnullina G. School of Life Sciences, University of Nottingham, NG7 2RD, Nottingham, UK aut NATIONALLICENCE 700 1- Sutton M. Centre for Ecology and Hydrology, EH26 0QB, Penicuik, UK aut NATIONALLICENCE 700 1- Tang Y. Centre for Ecology and Hydrology, EH26 0QB, Penicuik, UK aut NATIONALLICENCE 700 1- Theobald M. E.T.S.I Agrónomos, Technical University of Madrid, 28040, Madrid, Spain aut NATIONALLICENCE 773 0- Biogeochemistry Springer International Publishing 122/2-3(2015-02-01), 295-311 0168-2563 122:2-3<295 2015 122 10533