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Johannes Kollmann
Technische Universität München
EcologyGrasslandAgroforestryBotanyBiology
56Publications
11H-index
436Citations
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Publications 96
Newest
#1Gustavo Brant Paterno (UFRN: Federal University of Rio Grande do Norte)H-Index: 5
#2Carina Lima Silveira (Universidade do Vale do Rio dos Sinos)
Last. Carlos Fonseca (UFRN: Federal University of Rio Grande do Norte)H-Index: 22
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Flower biomass varies widely across the angiosperms. Each plant species invests a given amount of biomass to construct its sex organs. A comparative understanding of how this limited resource is partitioned among primary (male and female structures) and secondary (petals and sepals) sexual organs on hermaphrodite species can shed light on general evolutionary processes behind flower evolution. Here, we use allometries relating different flower biomass components across species to test the existe...
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#1Jakob K. Huber (TUM: Technische Universität München)H-Index: 1
#2Johannes Kollmann (TUM: Technische Universität München)H-Index: 11
Abstract Calcareous grasslands are rich in biodiversity and thus receive much attention in nature conservation. In such grasslands, the formation of moss layers is perceived as a management problem. However, its impacts on the community level are complex, as not only inhibition but also facilitation of vascular plant recruitment occur. Possible filters of recruitment are shading by mosses, isolation from soil resources and the resulting desiccation. To understand how seed size and shape moderate...
2 CitationsSource
#1Anna BucharovaH-Index: 11
#2Nina FarwigH-Index: 22
Last. Johannes KollmannH-Index: 11
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#1Leonardo H. Teixeira (UFRN: Federal University of Rio Grande do Norte)
#2Brunno F. Oliveira (UFRN: Federal University of Rio Grande do Norte)
Last. Gislene Ganade (UFRN: Federal University of Rio Grande do Norte)H-Index: 16
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Abstract Understanding the role plant species play on ecosystems is fundamental for restoration programs, particularly in semi-arid areas because land-use intensification combined with critical droughts has resulted in widespread desertification. Here, we evaluate 15 species of native trees for restoring degraded areas in the Brazilian semi-arid region on the basis of the suitability of their functional traits to ecosystem multifunctionality. To do so, we performed a short-term greenhouse experi...
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#1Jens Kattge (MPG: Max Planck Society)H-Index: 47
#2Gerhard Bönisch (MPG: Max Planck Society)H-Index: 24
Last. Christian Wirth (STRI: Smithsonian Tropical Research Institute)H-Index: 2
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Plant traits-the morphological, anatomical, physiological, biochemical and phenological characteristics of plants-determine how plants respond to environmental factors, affect other trophic levels, and influence ecosystem properties and their benefits and detriments to people. Plant trait data thus represent the basis for a vast area of research spanning from evolutionary biology, community and functional ecology, to biodiversity conservation, ecosystem and landscape management, restoration, bio...
17 CitationsSource
#1Leonardo H. Teixeira (UFRN: Federal University of Rio Grande do Norte)
Last. Johannes KollmannH-Index: 11
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Ecosystem properties can be positively affected by plant functional diversity and compromised by invasive alien plants. We performed a community assembly study in mesocosms manipulating different functional diversity levels for native grassland plants (communities composed by 1, 2 or 3 functional groups) to test if functional dispersion could constrain the impacts of an invasive alien plant (Solidago gigantea) on soil fertility and plant community biomass via complementarity. Response variables ...
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#1Katharina Strobl (TUM: Technische Universität München)H-Index: 3
#2Johannes Kollmann (TUM: Technische Universität München)H-Index: 11
Last. Leonardo H. Teixeira (TUM: Technische Universität München)
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#1Weiwei Lu (TUM: Technische Universität München)
#2Raquel Arias Font (TUM: Technische Universität München)H-Index: 1
Last. Johannes Kollmann (TUM: Technische Universität München)H-Index: 11
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Abstract A large number of qualitative and semi-quantitative analyses have been performed to summarize the effects of river restoration, while systematic and quantitative assessments of the literature on river restoration are still rare. To fill this gap, we conducted a meta-analysis of 55 peer-reviewed publications describing assessments of river restoration with indicators of biodiversity or ecosystem services (ES). The core of the study was to identify: (i) the overall ecological effects of r...
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#1Katharina Strobl (TUM: Technische Universität München)H-Index: 3
Last. Johannes Kollmann (TUM: Technische Universität München)H-Index: 11
view all 3 authors...
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#1A. KlimkowskaH-Index: 10
#2Klara GoldsteinH-Index: 1
Last. Wiktor Kotowski (University of Warsaw)H-Index: 15
view all 33 authors...
In peatland restoration we often lack an information whether re-established ecosystems are functionally similar to non-degraded ones. We re-analysed the long-term outcomes of restoration on vegetation and plant functional traits in 38 European fens restored by rewetting (18 sites) and topsoil removal (20 sites). We used traits related to nutrient acquisition strategies, competitiveness, seed traits, and used single- and multi-trait metrics. A separate set of vegetation records from near-natural ...
1 CitationsSource
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