Kluge, Jürgen

[["dc.bibliographiccitation.firstpage","13"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Plant Ecology & Diversity"],["dc.bibliographiccitation.lastpage","24"],["dc.bibliographiccitation.volume","8"],["dc.contributor.author","Salazar, Laura"],["dc.contributor.author","Homeier, Juergen"],["dc.contributor.author","Kessler, Michael"],["dc.contributor.author","Abrahamczyk, Stefan"],["dc.contributor.author","Lehnert, Marcus"],["dc.contributor.author","Kroemer, Thorsten"],["dc.contributor.author","Kluge, Juergen"],["dc.date.accessioned","2018-11-07T10:02:23Z"],["dc.date.available","2018-11-07T10:02:23Z"],["dc.date.issued","2015"],["dc.description.abstract","Background: Biodiversity is perceived to decline from lowlands towards mountain peaks and away from the Equator towards the Poles, but supporting data for most groups of organisms are lacking, especially at the local scale. Aims: Elevational gradients of fern species richness in tropical forest habitats were analysed to test the hypotheses that fern species composition patterns were similar between elevational gradients, that total species richness of complete elevational gradients gradually declined due to changing climatic conditions with increasing distance from the Equator, and that the elevation of highest species richness gradually declined with increasing latitude. Methods: We used plot-based elevational fern species richness surveys compiled from recent field work and own published studies, between 18 degrees N and 18 degrees S along the Andean mountain range, and compared the transects of patterns of species richness and composition, and distribution of taxa. Results: Taxonomic composition was highly similar among tropical regions. Elevational richness patterns were symmetrically hump-shaped and overall richness was virtually equal along most of the tropical latitudinal gradient. In contrast, the subtropical localities at the edges of our study area, ca. 18 degrees N and 18 degrees S, showed strikingly different patterns from those in the tropical zone. Conclusions: Within the tropics, there appears to be no latitudinal diversity gradient of ferns at the local scale. We suggest that, in tropical habitats, species richness of ferns at the local scale is limited by the number of species that can co-occur and that the available niche space is saturated."],["dc.description.sponsorship","Schweizer Nationalfonds (SNF); German Academic Exchange Service (DAAD)"],["dc.identifier.doi","10.1080/17550874.2013.843036"],["dc.identifier.isi","000349391300002"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/38214"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Taylor & Francis Ltd"],["dc.relation.issn","1755-1668"],["dc.relation.issn","1755-0874"],["dc.title","Diversity patterns of ferns along elevational gradients in Andean tropical forests"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","887"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","Oecologia"],["dc.bibliographiccitation.lastpage","900"],["dc.bibliographiccitation.volume","175"],["dc.contributor.author","Kessler, Michael"],["dc.contributor.author","Guedel, Ramona"],["dc.contributor.author","Salazar, Laura"],["dc.contributor.author","Homeier, Juergen"],["dc.contributor.author","Kluge, Juergen"],["dc.date.accessioned","2018-11-07T09:38:21Z"],["dc.date.available","2018-11-07T09:38:21Z"],["dc.date.issued","2014"],["dc.description.abstract","Mycorrhizal fungi are crucial for the ecological success of land plants, providing their hosts with nutrients in exchange for organic C. However, not all plants are mycorrhizal, especially ferns, of which about one-third of the species lack this symbiosis. Because the mycorrhizal status is evolutionarily ancestral, this lack of mycorrhizae must have ecological advantages, but what these advantages are and how they affect the competitive ability of non-mycorrhizal plants under natural conditions is currently unknown. To address this uncertainty, we studied terrestrial fern assemblages and species abundances as well as their mycorrhization status, leaf nutrient concentration and relative annual growth along an elevational gradient in the Ecuadorian Andes (500-4,000 m). We surveyed the mycorrhizal status of 375 root samples belonging to 85 species, and found mycorrhizae in 89 % of the samples. The degree of mycorrhization decreased with elevation but was unrelated to soil nutrients. Species with mycorrhizae were significantly more abundant than non-mycorrhizal species, but non-mycorrhizal species had significantly higher relative growth and concentrations of leaf N, P, Mg, and Ca. Our study thus shows that despite lower abundances, non-mycorrhizal fern species did not appear to be limited in their growth or nutrient supply relative to mycorrhizal ones. As a basis for future studies, we hypothesize that non-mycorrhizal fern species may be favoured in special microhabitats of the forest understory with high soil nutrient or water availability, or that the ecological benefit of mycorrhizae is not related to nutrient uptake but rather to, for example, pathogen resistance."],["dc.identifier.doi","10.1007/s00442-014-2941-7"],["dc.identifier.isi","000338202600013"],["dc.identifier.pmid","24719210"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/33049"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.relation.issn","1432-1939"],["dc.relation.issn","0029-8549"],["dc.title","Impact of mycorrhization on the abundance, growth and leaf nutrient status of ferns along a tropical elevational gradient"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","277"],["dc.bibliographiccitation.journal","Ecological Indicators"],["dc.bibliographiccitation.lastpage","281"],["dc.bibliographiccitation.volume","20"],["dc.contributor.author","Karger, Dirk Nikolaus"],["dc.contributor.author","Kluge, Juergen"],["dc.contributor.author","Abrahamczyk, Stefan"],["dc.contributor.author","Salazar, Laura"],["dc.contributor.author","Homeier, Juergen"],["dc.contributor.author","Lehnert, Marcus"],["dc.contributor.author","Amoroso, Victor B."],["dc.contributor.author","Kessler, Michael"],["dc.date.accessioned","2018-11-07T09:07:02Z"],["dc.date.available","2018-11-07T09:07:02Z"],["dc.date.issued","2012"],["dc.description.abstract","Climatic conditions are a prime candidate to explain local patterns of biodiversity and consequently there is great need of on-site climatic measurements. Among them, however, air humidity is notoriously difficult and time-consuming to measure, and it has been proposed that the epiphytic bryophyte cover can be used as an indicator of long-term air humidity conditions. Here we explore the utility of visually estimated epiphytic bryophyte cover on large canopy branches as a proxy for air humidity at 26 study sites in tropical forests where we measured microclimate for at least 12 months. Across all sites, bryophyte cover was weakly related to relative air humidity (R-2 = 0.17), but when we separated highland (1800-3500 m elevation) from lowland (<1800m) sites, relative air humidity showed significant and distinct relations to bryophyte cover (R-2 = 0.36-0.62), whereas temperature was related to bryophyte cover only in the lowlands (R-2 = 0.36). We conclude that epiphytic bryophyte cover can be used as a proxy for air humidity if temperature and elevation are taken into account within a circumscribed study region, but might not be applicable for comparisons across extensive elevational gradients or wide differences in temperature. (C) 2012 Elsevier Ltd. All rights reserved."],["dc.identifier.doi","10.1016/j.ecolind.2012.02.026"],["dc.identifier.isi","000303788000032"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/25698"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Elsevier Science Bv"],["dc.relation.issn","1470-160X"],["dc.title","Bryophyte cover on trees as proxy for air humidity in the tropics"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1623"],["dc.bibliographiccitation.issue","6"],["dc.bibliographiccitation.journal","Journal of Ecology"],["dc.bibliographiccitation.lastpage","1633"],["dc.bibliographiccitation.volume","102"],["dc.contributor.author","Kessler, Michael"],["dc.contributor.author","Salazar, Laura"],["dc.contributor.author","Homeier, Juergen"],["dc.contributor.author","Kluge, Juergen"],["dc.date.accessioned","2018-11-07T09:33:09Z"],["dc.date.available","2018-11-07T09:33:09Z"],["dc.date.issued","2014"],["dc.description.abstract","The species richness-productivity relationship (SRPR), by which the species richness of habitats or ecosystems is related to the productivity of the ecosystem or the taxon, has been documented both on regional and local scales, but its generality, biological meaning and underlying mechanisms remain debated. We evaluated the SRPR and three mechanistic hypotheses using terrestrial ferns in 18 study plots along an elevational gradient (500-4000m) in Ecuador. We measured annual increases in above-ground biomass of 6175 fern individuals from 91 species over 2years, and estimated plot-level tree productivity from increases in above-ground woody biomass of 560 trees. Analyses were conducted by (i) comparing plots along the elevational gradient (regional scale) and (ii) comparing plots within each elevational belt (local scale). Fern diversity was related to the productivity of the fern assemblages, but not to above-ground productivity of the trees. At the regional scale, we found a positive relationship of fern species richness to fern productivity that appeared to be determined by an increase in the number of fern individuals and niche availability. In contrast, at the local scale, this relationship was negative and likely driven by interspecific competition.Synthesis. Plot diversity of ferns appears to be limited by the number of available niches and competition to occupy these niches. At the local scale, this is reflected in a negative SRPR probably driven by competition, whereas with increasing scale, the positive influence of productivity emerges. This represents the first evidence that productivity and competition affect the diversity of tropical herb assemblages at the plot scale."],["dc.description.sponsorship","Schweizer National funds (SNF); German Academic Exchange Service (DAAD)"],["dc.identifier.doi","10.1111/1365-2745.12299"],["dc.identifier.isi","000344333800027"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/31903"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Wiley"],["dc.relation.issn","1365-2745"],["dc.relation.issn","0022-0477"],["dc.title","Species richness-productivity relationships of tropical terrestrial ferns at regional and local scales"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","203"],["dc.bibliographiccitation.lastpage","218"],["dc.contributor.author","Homeier, Jürgen"],["dc.contributor.author","Salazar, Laura"],["dc.contributor.author","Chinchero, Miguel Angel"],["dc.contributor.author","Bossen, Sarah"],["dc.contributor.author","Trogisch, Stefan"],["dc.contributor.author","Unger, Malte"],["dc.contributor.author","Kessler, Michael"],["dc.contributor.author","Kluge, Jürgen"],["dc.contributor.author","Navarrete, Hugo"],["dc.contributor.author","Leuschner, Christoph"],["dc.contributor.editor","Torres, Bolier"],["dc.contributor.editor","Vargas, Julio C."],["dc.contributor.editor","Arteaga, Yasiel"],["dc.contributor.editor","Torres, Alexandra"],["dc.contributor.editor","Lozano, Pablo"],["dc.date.accessioned","2018-02-26T10:53:54Z"],["dc.date.available","2018-02-26T10:53:54Z"],["dc.date.issued","2017"],["dc.description.abstract","La variación de la biodiversidad de la región amazónica ecuatoriana, a través de patrones geográficos, como los gradientes altitudinales, es muy interesante. En este artículo se describen los cambios de factores climáticos y edafológicos a lo largo de un gradiente altitudinal que va desde 500 m a 4000 m en la Reserva Biósfera Sumaco (RBS) y cómo estos cambios afectan la estructura del bosque y la riqueza de especies en diferentes grupos de plantas. Para comprender y caracterizar los parámetros estándar más importantes de la vegetación del gradiente altitudinal de la RBS se instalaron 92 cuadrantes permanentes de 400m², distribuidos en 8 niveles altitudinales. En cada cuadrante se analizaron diferentes parámetros de suelo y clima, además de la diversidad y caracteres funcionales de diferentes grupos de plantas. Tanto la vegetación como las propiedades del suelo presentaron diferencias entre los distintossitios y niveles altitudinales."],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/12619"],["dc.language.iso","es"],["dc.notes.status","final"],["dc.publisher","Universidad Estatal Amazónica"],["dc.publisher.place","Puyo, Pastaza, Ecuador"],["dc.relation.isbn","978-9942-932-19-8"],["dc.relation.ispartof","Gente, Bosque y Biodiversidad: El rol del bosque sobre la biodiversidad y las poblaciones rurales"],["dc.title","Diversidad de plantas vasculares en relación con factores edafológicos y climáticos en los bosques de la Reserva Biosfera Sumaco y sus alrededores"],["dc.type","book_chapter"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","59"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Journal of Biogeography"],["dc.bibliographiccitation.lastpage","71"],["dc.bibliographiccitation.volume","47"],["dc.contributor.author","Weigand, Anna"],["dc.contributor.author","Abrahamczyk, Stefan"],["dc.contributor.author","Aubin, Isabelle"],["dc.contributor.author","Bita-Nicolae, Claudia"],["dc.contributor.author","Bruelheide, Helge"],["dc.contributor.author","Carvajal‐Hernández, Cesar I."],["dc.contributor.author","Cicuzza, Daniele"],["dc.contributor.author","Nascimento da Costa, Lucas Erickson"],["dc.contributor.author","Csiky, János"],["dc.contributor.author","Dengler, Jürgen"],["dc.contributor.author","Gasper, André Luís de"],["dc.contributor.author","Guerin, Greg R."],["dc.contributor.author","Haider, Sylvia"],["dc.contributor.author","Hernández‐Rojas, Adriana"],["dc.contributor.author","Jandt, Ute"],["dc.contributor.author","Reyes‐Chávez, Johan"],["dc.contributor.author","Karger, Dirk Nikolaus"],["dc.contributor.author","Khine, Phyo Kay"],["dc.contributor.author","Kluge, Jürgen"],["dc.contributor.author","Krömer, Thorsten"],["dc.contributor.author","Lehnert, Marcus"],["dc.contributor.author","Lenoir, Jonathan"],["dc.contributor.author","Moulatlet, Gabriel M."],["dc.contributor.author","Aros-Mualin, Daniela"],["dc.contributor.author","Noben, Sarah"],["dc.contributor.author","Olivares, Ingrid"],["dc.contributor.author","Quintanilla, Luis G."],["dc.contributor.author","Reich, Peter B."],["dc.contributor.author","Salazar, Laura"],["dc.contributor.author","Silva‐Mijangos, Libertad"],["dc.contributor.author","Tuomisto, Hanna"],["dc.contributor.author","Weigelt, Patrick"],["dc.contributor.author","Zuquim, Gabriela"],["dc.contributor.author","Kreft, Holger"],["dc.contributor.author","Kessler, Michael"],["dc.date.accessioned","2020-04-03T13:36:40Z"],["dc.date.available","2020-04-03T13:36:40Z"],["dc.date.issued","2019"],["dc.identifier.doi","10.1111/jbi.13782"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/63634"],["dc.relation.issn","0305-0270"],["dc.relation.issn","1365-2699"],["dc.relation.orgunit","Zentrum für Biodiversität und Nachhaltige Landnutzung"],["dc.title","Global fern and lycophyte richness explained: How regional and local factors shape plot richness"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]