The role of environmental filters in Brazilian savanna vegetation dynamics

2021 ◽  
Vol 500 ◽  
pp. 119645
Author(s):  
Natielle Gomes Cordeiro ◽  
Kelly Marianne Guimarães Pereira ◽  
Marcela de Castro Nunes Santos Terra ◽  
Eduarda Martiniano de Oliveira Silveira ◽  
Ivy Mayara Sanches de Oliveira ◽  
...  
Keyword(s):  
Vegetation Dynamics ◽  
Brazilian Savanna ◽  
Environmental Filters ◽  
Savanna Vegetation

scholarly journals Biodiversity and conservation of terricolous lichens and bryophytes in continental lowlands of northern Italy: the role of different dry habitat types

2020 ◽  
Vol 29 (13) ◽  
pp. 3533-3550
Author(s):  
Gabriele Gheza ◽  
Silvia Assini ◽  
Chiara Lelli ◽  
Lorenzo Marini ◽  
Helmut Mayrhofer ◽  
...  
Keyword(s):  
Species Richness ◽  
Vegetation Dynamics ◽  
Biodiversity Loss ◽  
Northern Italy ◽  
Environmental Drivers ◽  
Dry Grasslands ◽  
Species Of Conservation Concern ◽  
Terricolous Lichens ◽  
Landscape Scales

Abstract In dry habitats of European lowlands terricolous lichens and bryophytes are almost neglected in conservation practises, even if they may strongly contribute to biodiversity. This study aims at (a) testing the role of heathlands, acidic and calcareous dry grasslands for lichen and bryophyte diversity and conservation in lowland areas of northern Italy characterized by high human impact and habitat fragmentation; (b) detecting the effect of environmental drivers and vegetation dynamics on species richness and composition. Lichens, bryophytes, vascular plants, and environmental variables were recorded in 287 circular plots for 75 sites. Our results indicate that heathlands, acidic and calcareous dry grasslands host peculiar terricolous lichen and bryophyte communities that include several species of conservation concern. Thus, each habitat provides a complementary contribution to lichen and bryophyte diversity in continental lowland landscapes. Furthermore, in each habitat different factors drive species richness and composition with contrasting patterns between lichens and bryophytes. In terms of conservation, our results indicate that management of lowland dry habitats should act at both local and landscape scales. At local scale, vegetation dynamics should be controlled in order to avoid biodiversity loss due to vegetation dynamics and wood encroachment. At the landscape scale, patches of all the three habitats should be maintained to maximize regional diversity.

scholarly journals A Holocene record of savanna vegetation dynamics in southern lowland Papua New Guinea

2019 ◽  
Vol 29 (1) ◽  
pp. 1-14
Author(s):  
Cassandra Rowe ◽  
Bruno David ◽  
Jerome Mialanes ◽  
Sean Ulm ◽  
Fiona Petchey ◽  
...  
Keyword(s):  
Papua New Guinea ◽  
Vegetation Dynamics ◽  
New Guinea ◽  
Savanna Vegetation ◽  
Holocene Record

An integrated modelling framework of catchment-scale ecohydrological processes: 2. The role of water subsidy by overland flow on vegetation dynamics in a semi-arid catchment

Ecohydrology ◽  
2013 ◽  
Vol 7 (2) ◽  
pp. 815-827 ◽  
Author(s):  
Guo-Yue Niu ◽  
Peter A. Troch ◽  
Claudio Paniconi ◽  
Russell L. Scott ◽  
Matej Durcik ◽  
...  
Keyword(s):  
Vegetation Dynamics ◽  
Overland Flow ◽  
Integrated Modelling ◽  
Catchment Scale ◽  
Modelling Framework ◽  
Semi Arid ◽  
Ecohydrological Processes

scholarly journals The role of vadose zone physics in the ecohydrological response of a Tibetan meadow to freeze–thaw cycles

2020 ◽  
Vol 14 (12) ◽  
pp. 4653-4673
Author(s):  
Lianyu Yu ◽  
Simone Fatichi ◽  
Yijian Zeng ◽  
Zhongbo Su
Keyword(s):  
Vadose Zone ◽  
Ecosystem Functioning ◽  
Vegetation Dynamics ◽  
Water Transfer ◽  
The Tibetan Plateau ◽  
Soil System ◽  
Cold Regions ◽  
Freeze Thaw ◽  
The Impact

Abstract. The vadose zone is a zone sensitive to environmental changes and exerts a crucial control in ecosystem functioning and even more so in cold regions considering the rapid change in seasonally frozen ground under climate warming. While the way in representing the underlying physical process of the vadose zone differs among models, the effect of such differences on ecosystem functioning and its ecohydrological response to freeze–thaw cycles are seldom reported. Here, the detailed vadose zone process model STEMMUS (Simultaneous Transfer of Energy, Mass and Momentum in Unsaturated Soil) was coupled with the ecohydrological model Tethys–Chloris (T&C) to investigate the role of influential physical processes during freeze–thaw cycles. The physical representation is increased from using T&C coupling without STEMMUS enabling the simultaneous mass and energy transfer in the soil system (liquid, vapor, ice) – and with explicit consideration of the impact of soil ice content on energy and water transfer properties – to using T&C coupling with it. We tested model performance with the aid of a comprehensive observation dataset collected at a typical meadow ecosystem on the Tibetan Plateau. Results indicated that (i) explicitly considering the frozen soil process significantly improved the soil moisture/temperature profile simulations and facilitated our understanding of the water transfer processes within the soil–plant–atmosphere continuum; (ii) the difference among various representations of vadose zone physics have an impact on the vegetation dynamics mainly at the beginning of the growing season; and (iii) models with different vadose zone physics can predict similar interannual vegetation dynamics, as well as energy, water, and carbon exchanges, at the land surface. This research highlights the important role of vadose zone physics for ecosystem functioning in cold regions and can support the development and application of future Earth system models.

THE ROLE OF VEGETATION DYNAMICS IN CHOCTAWHATCHEE SAND PINE INVASION OF LONGLEAF PINE FORESTS

2001 ◽  
Vol 22 (6) ◽  
pp. 467-482 ◽  
Author(s):  
Deanna H. McCay ◽  
Kathleen C. Parker
Keyword(s):  
Vegetation Dynamics ◽  
Longleaf Pine ◽  
Pine Forests ◽  
Pine Invasion ◽  
Sand Pine

scholarly journals How vadose zone mass and energy transfer physics affects the ecohydrological dynamics of a Tibetan meadow?

2020 ◽  
Author(s):  
Lianyu Yu ◽  
Yijian Zeng ◽  
Simone Fatichi ◽  
Zhongbo Su
Keyword(s):  
Vadose Zone ◽  
Land Surface ◽  
Ecosystem Functioning ◽  
Vegetation Dynamics ◽  
Process Model ◽  
Environmental Changes ◽  
Model Performance ◽  
Frozen Soil ◽  
The Tibetan Plateau

Abstract. The vadose zone is a sensitive region to environmental changes and exerts a crucial control in ecosystem functioning. While the way in representing the underlying process of vadose zone differs among models, the effect of such differences on ecosystem functioning is seldomly reported. Here, the detailed vadose zone process model STEMMUS was coupled with the ecohydrological model T&C to investigate the role of solving influential physical processes, considering different soil water and heat transfer parameterizations including frozen soils. We tested model performance with the aid of a comprehensive observation dataset collected at a typical meadow ecosystem on the Tibetan Plateau. Results indicated that: i) explicitly considering the frozen soil process significantly improved the soil moisture/temperature (SM/ST) profile simulations and facilitated our understanding of the water transfer processes within the soil-plant-atmosphere continuum; ii) the difference among various complexity of vadose zone physics have an impact on the vegetation dynamics mainly at the beginning of the growing season; iii) models with different vadose zone physics can predict similar interannual vegetation dynamics, and energy, water and carbon exchanges at the land-surface. This research highlights the role of vadose zone models and their underlying physics, in ecosystem functioning and can guide the development and applications of future earth system models.

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