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@ARTICLE{Dojani:56249,
author = {Dojani, S. and Lakatos, M. and Rascher, U. and Wanek, W.
and Lüttge, U. and Büdel, B.},
title = {{N}itrogen input by cyanobacterial biofilms on an inselberg
into a tropical rainforest in {F}rench {G}uiana},
journal = {Flora},
volume = {202},
issn = {1618-0585},
address = {München},
publisher = {Elsevier},
reportid = {PreJuSER-56249},
pages = {521 - 529},
year = {2007},
note = {Record converted from VDB: 12.11.2012},
abstract = {Inselbergs are isolated rock outcrops displaying high
heterogeneity in both soil formation and microclimatic
condition with high variation in plant biodiversity.
Vegetation patterns on inselbergs in the humid tropics range
from rocks covered with dense biofilms predominated by
cyanobacteria to high forest on deep soils. Along a similar
transect, we investigated N supply to the vegetation using
element and isotopic analyses of soil and biofilm samples
from an inselberg in French Guiana. An increase in N content
related to total dry weight $(N\%)$ in soils from the
inselberg peak to surrounding habitats was related to
changes in stable isotope composition (delta N-15). At the
inselberg peak cyanobacterial biofilms on bare rocks and
soils within small vegetation islands had similar delta N-15
values of -1.9 parts per thousand and - 1.3 parts per
thousand while delta N-15 of soils progressively increased
towards the primary rainforest up to 6 parts per thousand.
From the peak towards the base of the inselberg, the density
of higher plants and soil depth increased. Hence, soil N
cycling and N losses to the environment resulted in a
progressive increase of soil delta N-15. The distribution of
$N\%,$ delta N-15 and delta C-13 values suggest that the
main N supply for soils at and nearby the inselberg is
derived from cyanobacterial N-2 fixation through leaching
processes. (c) 2007 Elsevier GmbH. All rights reserved.},
keywords = {J (WoSType)},
cin = {ICG-3},
ddc = {580},
cid = {I:(DE-Juel1)ICG-3-20090406},
pnm = {Terrestrische Umwelt},
pid = {G:(DE-Juel1)FUEK407},
shelfmark = {Plant Sciences},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000249447400003},
doi = {10.1016/j.flora.2006.12.001},
url = {https://juser.fz-juelich.de/record/56249},
}