Articles | Volume 7, issue 11
https://doi.org/10.5194/bg-7-3435-2010
© Author(s) 2010. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Special issue:
https://doi.org/10.5194/bg-7-3435-2010
© Author(s) 2010. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
05 Nov 2010
Sediment core fossils in ancient Lake Ohrid: testing for faunal change since the Last Interglacial
C. Albrecht
Department of Animal Ecology & Systematics, Justus Liebig University Giessen, Germany
H. Vogel
Institute of Geology and Mineralogy, University of Cologne, Germany
T. Hauffe
Department of Animal Ecology & Systematics, Justus Liebig University Giessen, Germany
T. Wilke
Department of Animal Ecology & Systematics, Justus Liebig University Giessen, Germany
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Environmental drivers of spatio-temporal dynamics in floodplain vegetation: grasslands as habitat for megafauna in Bardia National Park (Nepal)
Geodiversity influences limnological conditions and freshwater ostracode species distributions across broad spatial scales in the northern Neotropics
Arctic aquatic graminoid tundra responses to nutrient availability
Stable isotopic composition of top consumers in Arctic cryoconite holes: revealing divergent roles in a supraglacial trophic network
Experimental tests of water chemistry response to ornithological eutrophication: biological implications in Arctic freshwaters
Ideas and perspectives: Carbon leaks from flooded land: do we need to replumb the inland water active pipe?
Significance of climate and hydrochemistry on shape variation – a case study on Neotropical cytheroidean Ostracoda
Assembly processes of gastropod community change with horizontal and vertical zonation in ancient Lake Ohrid: a metacommunity speciation perspective
Controls on microalgal community structures in cryoconite holes upon high-Arctic glaciers, Svalbard
Unusual biogenic calcite structures in two shallow lakes, James Ross Island, Antarctica
Co-occurrence patterns in aquatic bacterial communities across changing permafrost landscapes
Constant diversification rates of endemic gastropods in ancient Lake Ohrid: ecosystem resilience likely buffers environmental fluctuations
Riparian and in-stream controls on nutrient concentrations and fluxes in a headwater forested stream
Synergistic effects of UVR and simulated stratification on commensalistic phytoplankton–bacteria relationship in two optically contrasting oligotrophic Mediterranean lakes
Explosive demographic expansion by dreissenid bivalves as a possible result of astronomical forcing
Phytoplankton community structure in the Lena Delta (Siberia, Russia) in relation to hydrography
Lacustrine mollusc radiations in the Lake Malawi Basin: experiments in a natural laboratory for evolution
DNA from lake sediments reveals the long-term dynamics and diversity of Synechococcus assemblages
Interactive effects of vertical mixing, nutrients and ultraviolet radiation: in situ photosynthetic responses of phytoplankton from high mountain lakes in Southern Europe
Eutrophication and warming effects on long-term variation of zooplankton in Lake Biwa
Spatially explicit analysis of gastropod biodiversity in ancient Lake Ohrid
A freshwater biodiversity hotspot under pressure – assessing threats and identifying conservation needs for ancient Lake Ohrid
Stratigraphic analysis of lake level fluctuations in Lake Ohrid: an integration of high resolution hydro-acoustic data and sediment cores
Testing the spatial and temporal framework of speciation in an ancient lake species flock: the leech genus Dina (Hirudinea: Erpobdellidae) in Lake Ohrid
Native Dreissena freshwater mussels in the Balkans: in and out of ancient lakes
Jitse Bijlmakers, Jasper Griffioen, and Derek Karssenberg
Biogeosciences, 20, 1113–1144, https://doi.org/10.5194/bg-20-1113-2023, https://doi.org/10.5194/bg-20-1113-2023, 2023
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At the foot of the Himalayas in Nepal, land cover time series and data of environmental drivers show changes in disturbance-dependent grasslands that serve as habitat for endangered megafauna. The changes in surface area and heterogeneity of the grassland patches are attributed to a relocation of the dominant river channel of the Karnali River and associated decline of hydromorphological disturbances and a decrease in anthropogenic disturbances after its establishment as conservation area.
Laura Macario-González, Sergio Cohuo, Philipp Hoelzmann, Liseth Pérez, Manuel Elías-Gutiérrez, Margarita Caballero, Alexis Oliva, Margarita Palmieri, María Renée Álvarez, and Antje Schwalb
Biogeosciences, 19, 5167–5185, https://doi.org/10.5194/bg-19-5167-2022, https://doi.org/10.5194/bg-19-5167-2022, 2022
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We evaluate the relationships between geodiversity, limnological conditions, and freshwater ostracodes from southern Mexico to Nicaragua. Geological, limnological, geochemical, and mineralogical characteristics of 76 systems reveal two main limnological regions and seven subregions. Water ionic and sediment composition are the most influential. Geodiversity strongly influences limnological conditions, which in turn influence ostracode composition and distribution.
Christian G. Andresen and Vanessa L. Lougheed
Biogeosciences, 18, 2649–2662, https://doi.org/10.5194/bg-18-2649-2021, https://doi.org/10.5194/bg-18-2649-2021, 2021
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Aquatic tundra plants dominate productivity and methane fluxes in the Arctic coastal plain. We assessed how environmental nutrient availability influences production of biomass and greenness of aquatic tundra. We found phosphorous to be the main nutrient limiting biomass productivity and greenness in Arctic aquatic grasses. This study highlights the importance of nutrient pools and mobilization between terrestrial–aquatic systems and their influence on regional carbon and energy feedbacks.
Tereza Novotná Jaroměřská, Jakub Trubač, Krzysztof Zawierucha, Lenka Vondrovicová, Miloslav Devetter, and Jakub D. Žárský
Biogeosciences, 18, 1543–1557, https://doi.org/10.5194/bg-18-1543-2021, https://doi.org/10.5194/bg-18-1543-2021, 2021
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Cryoconite holes are ponds on the glacier surface that play an important role in glacier nutrient pathways. This paper presents the first description of the carbon and nitrogen isotopic composition of cryoconite consumers (tardigrades and rotifers) and their potential food. We showed that consumers differ in nitrogen isotopes and carbon isotopes vary between taxa and between glaciers. The study contributes to improving knowledge about cryoconite hole functioning and cryoconite trophic networks.
Heather L. Mariash, Milla Rautio, Mark Mallory, and Paul A. Smith
Biogeosciences, 16, 4719–4730, https://doi.org/10.5194/bg-16-4719-2019, https://doi.org/10.5194/bg-16-4719-2019, 2019
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Across North America and Europe, goose populations have increased exponentially in response to agricultural intensification. By using an experimental approach, we empirically demonstrated that geese act as bio-vectors, making terrestrial nutrients more bioavailable to freshwater systems. The study revealed that the nutrient loading from goose faeces has the potential to change phytoplankton community composition, with a shift toward an increased presence of cyanobacteria.
Gwenaël Abril and Alberto V. Borges
Biogeosciences, 16, 769–784, https://doi.org/10.5194/bg-16-769-2019, https://doi.org/10.5194/bg-16-769-2019, 2019
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Based on classical concepts in ecology, and a literature survey, we highlight the importance of flooded land as a preferential source of atmospheric carbon to aquatic systems at the global scale. Studies in terrestrial and aquatic ecosystems could be reconciled by considering the occurrence of an efficient wetland CO2 pump to river systems. New methodological approaches coupling hydrology and ecology are also necessary to improve scientific knowledge on carbon fluxes at the land–water interface.
Claudia Wrozyna, Thomas A. Neubauer, Juliane Meyer, Maria Ines F. Ramos, and Werner E. Piller
Biogeosciences, 15, 5489–5502, https://doi.org/10.5194/bg-15-5489-2018, https://doi.org/10.5194/bg-15-5489-2018, 2018
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How environmental change affects a species' phenotype is crucial for taxonomy and biodiversity assessments and for their application as paleoecological indicators. Morphometric data of a Neotropical ostracod species, as well as several climatic and hydrochemical variables, were used to investigate the link between morphology and environmental conditions. Temperature seasonality, annual precipitation, and chloride and sulphate concentrations were identified as drivers for ostracod ecophenotypy.
Torsten Hauffe, Christian Albrecht, and Thomas Wilke
Biogeosciences, 13, 2901–2911, https://doi.org/10.5194/bg-13-2901-2016, https://doi.org/10.5194/bg-13-2901-2016, 2016
T. R. Vonnahme, M. Devetter, J. D. Žárský, M. Šabacká, and J. Elster
Biogeosciences, 13, 659–674, https://doi.org/10.5194/bg-13-659-2016, https://doi.org/10.5194/bg-13-659-2016, 2016
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The diversity of microalgae and cyanobacteria in cryoconites on three high-Arctic glaciers was investigated. Possible bottom-up controls via nutrient limitation, wind dispersal, and hydrological stability were measured. Grazer populations were quantified to estimate the effect of top-down controls. Nutrient limitation appeared to be the most important control on the diversity and competition outcomes of microalgae and cyanobacteria.
J. Elster, L. Nedbalová, R. Vodrážka, K. Láska, J. Haloda, and J. Komárek
Biogeosciences, 13, 535–549, https://doi.org/10.5194/bg-13-535-2016, https://doi.org/10.5194/bg-13-535-2016, 2016
J. Comte, C. Lovejoy, S. Crevecoeur, and W. F. Vincent
Biogeosciences, 13, 175–190, https://doi.org/10.5194/bg-13-175-2016, https://doi.org/10.5194/bg-13-175-2016, 2016
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Thaw ponds and lakes varied in their bacterial community structure. A small number of taxa occurred in high abundance and dominated many of the communities. Nevertheless, there were taxonomic differences among different valleys implying some degree of habitat selection. Association networks were composed of a limited number of highly connected OTUs. These "keystone species" were not merely the abundant taxa, whose loss would greatly alter the structure and functioning of these aquatic ecosystem.
K. Föller, B. Stelbrink, T. Hauffe, C. Albrecht, and T. Wilke
Biogeosciences, 12, 7209–7222, https://doi.org/10.5194/bg-12-7209-2015, https://doi.org/10.5194/bg-12-7209-2015, 2015
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Based on our molecular data and performed analyses we found that the gastropods studied represent a comparatively old group that most likely evolved with a constant rate of diversification. However, preliminary data of the SCOPSCO deep-drilling program indicate signatures of environmental/climatic perturbations in Lake Ohrid. We therefore propose that the constant rate observed has been caused by a potential lack of catastrophic environmental events and/or a high ecosystem resilience.
S. Bernal, A. Lupon, M. Ribot, F. Sabater, and E. Martí
Biogeosciences, 12, 1941–1954, https://doi.org/10.5194/bg-12-1941-2015, https://doi.org/10.5194/bg-12-1941-2015, 2015
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Terrestrial inputs are considered the major driver of longitudinal patterns of nutrient concentration. Yet we show that longitudinal trends result from hydrological mixing with terrestrial inputs and in-stream processes. We challenge the idea that nutrient concentrations decrease downstream when in-stream net uptake is high. Conversely, in-stream processes can strongly affect stream nutrient chemistry and fluxes even in the absence of consistent longitudinal trends in nutrient concentration.
P. Carrillo, J. M. Medina-Sánchez, C. Durán, G. Herrera, V. E. Villafañe, and E. W. Helbling
Biogeosciences, 12, 697–712, https://doi.org/10.5194/bg-12-697-2015, https://doi.org/10.5194/bg-12-697-2015, 2015
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Under UVR and stratification,the commensalistic algae-bacteria interaction was strengthened in the high-UVR lake, where excretion of organic carbon rates exceeded the bacterial carbon demand,but did not occur in the low-UVR lake.The greater UVR damage to algae and bacteria and the weakening of their commensalistic interaction found in the low-UVR lake indicates these lakes would be especially vulnerable to UVR. These results have implications for the C cycle in lakes of the Mediterranean region.
M. Harzhauser, O. Mandic, A. K. Kern, W. E. Piller, T. A. Neubauer, C. Albrecht, and T. Wilke
Biogeosciences, 10, 8423–8431, https://doi.org/10.5194/bg-10-8423-2013, https://doi.org/10.5194/bg-10-8423-2013, 2013
A. C. Kraberg, E. Druzhkova, B. Heim, M. J. G. Loeder, and K. H. Wiltshire
Biogeosciences, 10, 7263–7277, https://doi.org/10.5194/bg-10-7263-2013, https://doi.org/10.5194/bg-10-7263-2013, 2013
D. Van Damme and A. Gautier
Biogeosciences, 10, 5767–5778, https://doi.org/10.5194/bg-10-5767-2013, https://doi.org/10.5194/bg-10-5767-2013, 2013
I. Domaizon, O. Savichtcheva, D. Debroas, F. Arnaud, C. Villar, C. Pignol, B. Alric, and M. E. Perga
Biogeosciences, 10, 3817–3838, https://doi.org/10.5194/bg-10-3817-2013, https://doi.org/10.5194/bg-10-3817-2013, 2013
E. W. Helbling, P. Carrillo, J. M. Medina-Sánchez, C. Durán, G. Herrera, M. Villar-Argaiz, and V. E. Villafañe
Biogeosciences, 10, 1037–1050, https://doi.org/10.5194/bg-10-1037-2013, https://doi.org/10.5194/bg-10-1037-2013, 2013
C. H. Hsieh, Y. Sakai, S. Ban, K. Ishikawa, T. Ishikawa, S. Ichise, N. Yamamura, and M. Kumagai
Biogeosciences, 8, 1383–1399, https://doi.org/10.5194/bg-8-1383-2011, https://doi.org/10.5194/bg-8-1383-2011, 2011
T. Hauffe, C. Albrecht, K. Schreiber, K. Birkhofer, S. Trajanovski, and T. Wilke
Biogeosciences, 8, 175–188, https://doi.org/10.5194/bg-8-175-2011, https://doi.org/10.5194/bg-8-175-2011, 2011
G. Kostoski, C. Albrecht, S. Trajanovski, and T. Wilke
Biogeosciences, 7, 3999–4015, https://doi.org/10.5194/bg-7-3999-2010, https://doi.org/10.5194/bg-7-3999-2010, 2010
K. Lindhorst, H. Vogel, S. Krastel, B. Wagner, A. Hilgers, A. Zander, T. Schwenk, M. Wessels, and G. Daut
Biogeosciences, 7, 3531–3548, https://doi.org/10.5194/bg-7-3531-2010, https://doi.org/10.5194/bg-7-3531-2010, 2010
S. Trajanovski, C. Albrecht, K. Schreiber, R. Schultheiß, T. Stadler, M. Benke, and T. Wilke
Biogeosciences, 7, 3387–3402, https://doi.org/10.5194/bg-7-3387-2010, https://doi.org/10.5194/bg-7-3387-2010, 2010
T. Wilke, R. Schultheiß, C. Albrecht, N. Bornmann, S. Trajanovski, and T. Kevrekidis
Biogeosciences, 7, 3051–3065, https://doi.org/10.5194/bg-7-3051-2010, https://doi.org/10.5194/bg-7-3051-2010, 2010
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