Interactive Effects of Nitrogen and Water Addition on Competitive Hierarchies Between Early- and Late- Successional Plant Species

2014 ◽  
Vol 62 (4) ◽  
pp. 665-678 ◽  
Author(s):  
Lili Jiang ◽  
Zhichun Lan ◽  
Guifeng Liu ◽  
Paul Kardol
Keyword(s):  
Plant Species ◽  
Interactive Effects ◽  
Water Addition ◽  
Nitrogen And Water Addition ◽  
Successional Plant ◽  
Competitive Hierarchies

Effects of Nitrogen and Water Addition on Plant Species Diversity and Biomass of Common Species in theStipa baicalensisSteppe, Inner Mongolia, China

2015 ◽  
Vol 35 (19) ◽  
Author(s):  
李文娇 LI Wenjiao ◽  
刘红梅 LIU Hongmei ◽  
赵建宁 ZHAO Jianning ◽  
修伟明 XIU Weimin ◽  
张贵龙 ZHANG Guilong ◽  
...  
Keyword(s):  
Species Diversity ◽  
Plant Species ◽  
Inner Mongolia ◽  
Common Species ◽  
Plant Species Diversity ◽  
Water Addition ◽  
Nitrogen And Water Addition

scholarly journals Interactive effects of climate change and plant invasion on alpine biodiversity and ecosystem dynamics

2021 ◽  
Author(s):  
◽  
Justyna Giejsztowt
Keyword(s):  
Climate Change ◽  
New Zealand ◽  
Plant Species ◽  
Climate Warming ◽  
Plant Invasion ◽  
Invasive Plant ◽  
Ecosystem Dynamics ◽  
Interactive Effects ◽  
Native Plant ◽  
Competition For Pollination

<p>Drivers of global change have direct impacts on the structure of communities and functioning of ecosystems, and interactions between drivers may buffer or exacerbate these direct effects. Interactions among drivers can lead to complex non-linear outcomes for ecosystems, communities and species, but are infrequently quantified. Through a combination of experimental, observational and modelling approaches, I address critical gaps in our understanding of the interactive effects of climate change and plant invasion, using Tongariro National Park (TNP; New Zealand) as a model. TNP is an alpine ecosystem of cultural significance which hosts a unique flora with high rates of endemism. TNP is invaded by the perennial shrub Calluna vulgaris (L.) Hull. My objectives were to: 1) determine whether species-specific phenological shifts have the potential to alter the reproductive capacity of native plants in landscapes affected by invasion; 2) determine whether the effect of invasion intensity on the Species Area Relationship (SAR) of native alpine plant species is influenced by environmental stress; 3) develop a novel modelling framework that would account for density-dependent competitive interactions between native species and C. vulgaris and implement it to determine the combined risk of climate change and plant invasion on the distribution of native plant species; and 4) explore the possible mechanisms leading to a discrepancy in C. vulgaris invasion success on the North and South Islands of New Zealand. I show that species-specific phenological responses to climate warming increase the flowering overlap between a native and an invasive plant. I then show that competition for pollination with the invader decreases the sexual reproduction of the native in some landscapes. I therefore illustrate a previously undescribed interaction between climate warming and plant invasion where the effects of competition for pollination with an invader on the sexual reproduction of the native may be exacerbated by climate warming. Furthermore, I describe a previously unknown pattern of changing invasive plant impact on SAR along an environmental stress gradient. Namely, I demonstrate that interactions between an invasive plant and local native plant species richness become increasingly facilitative along elevational gradients and that the strength of plant interactions is dependent on invader biomass. I then show that the consequences of changing plant interactions at a local scale for the slope of SAR is dependent on the pervasion of the invader. Next, I demonstrate that the inclusion of invasive species density data in distribution models for a native plant leads to greater reductions in predicted native plant distribution and density under future climate change scenarios relative to models based on climate suitability alone. Finally, I find no evidence for large-scale climatic, edaphic, and vegetative limitations to invasion by C. vulgaris on either the North and South Islands of New Zealand. Instead, my results suggest that discrepancies in invasive spread between islands may be driven by human activity: C. vulgaris is associated with the same levels of human disturbance on both islands despite differences in the presence of these conditions between then islands. Altogether, these results show that interactive effects between drivers on biodiversity and ecosystem dynamics are frequently not additive or linear. Therefore, accurate predictions of global change impacts on community structure and ecosystems function require experiments and models which include of interactions among drivers such as climate change and species invasion. These results are pertinent to effective conservation management as most landscapes are concurrently affected by multiple drivers of global environmental change.</p>

scholarly journals Nitrogen and water addition reduce leaf longevity of steppe species

2010 ◽  
Vol 107 (1) ◽  
pp. 145-155 ◽  
Author(s):  
Haiyan Ren ◽  
Zhuwen Xu ◽  
Jianhui Huang ◽  
Christopher Clark ◽  
Shiping Chen ◽  
...  
Keyword(s):  
Leaf Longevity ◽  
Water Addition ◽  
Steppe Species ◽  
Nitrogen And Water Addition

Effect of nitrate supply on the facilitation between two salt-marsh plants (Suaeda salsa and Scirpus planiculmis)

2020 ◽  
Vol 13 (2) ◽  
pp. 204-212
Author(s):  
Hua Ma ◽  
Li-Juan Cui ◽  
Xu Pan ◽  
Wei Li ◽  
Yu Ning ◽  
...  
Keyword(s):  
Salt Marsh ◽  
Plant Species ◽  
Salt Marshes ◽  
Interspecific Interactions ◽  
Stress Gradient ◽  
Interactive Effects ◽  
Suaeda Salsa ◽  
Environmental Drivers ◽  
Salt Marsh Plant ◽  
Nitrate Supply

Abstract Aims In estuarine salt-marshes, nitrate supply and soil salinity, which are known as two main environmental drivers, simultaneously affect the interspecific interactions between plant species. However, to date, their interactive effects on interspecific interactions have not been closely examined for salt-marsh plant species. Methods Juvenile plants of Suaeda salsa L. (Chenopodiaceae) and Scirpus planiculmis Fr. (Cyperaceae) were grown in rinsed river sand to conduct a greenhouse experiment with three treatment categories: interspecific interaction (mixed culture or monoculture), three salinity levels (1, 50 and 100 mmol L−1) and three nitrate levels (0.5, 5 and 10 mmol L−1). First, height and biomass of all plants were measured. Then, the growth data, relative interaction index and competitive important index of the two species were analyzed. Important Findings The interspecific interactions between S. salsa and S. planiculmis were facilitation across the salinity gradients. The promotion of S. salsa growth with high nitrate supply did not enhance the facilitative effect of the species, especially at low salinity. However, high nitrate supply significantly shifted the interspecific interactions of S. planiculmis from facilitation to competition at high salinity. Our results suggest that excessive nitrate application changes the prediction of the stress-gradient hypothesis along a salinity gradient, leading to collapse of the two species coexistence in the salt-marshes. These findings make a contribution to the understanding of how S. salsa and S. planiculmis, as well as salt-marsh communities, respond to the human modification of estuarine nutritional levels.

Morphological responses of six successional plant species in old-fields of the Loess Plateau to the pattern and level of nitrogen application in a pot experiment

2017 ◽  
Vol 37 (9) ◽  
Author(s):  
王雁南 WANG Yannan ◽  
杜峰 DU Feng ◽  
隋媛媛 SUI Yuanyuan ◽  
高艳 GAO Yan ◽  
李伟伟 LI Weiwei ◽  
...  
Keyword(s):  
Plant Species ◽  
Loess Plateau ◽  
Pot Experiment ◽  
Old Fields ◽  
Nitrogen Application ◽  
The Loess Plateau ◽  
Successional Plant ◽  
Morphological Responses

scholarly journals INTERACTIVE EFFECTS OF PLANT SPECIES DIVERSITY AND ELEVATED CO2ON SOIL BIOTA AND NUTRIENT CYCLING

Ecology ◽  
2007 ◽  
Vol 88 (12) ◽  
pp. 3153-3163 ◽  
Author(s):  
P. A. Niklaus ◽  
J. Alphei ◽  
C. Kampichler ◽  
E. Kandeler ◽  
C. Körner ◽  
...  
Keyword(s):  
Species Diversity ◽  
Nutrient Cycling ◽  
Plant Species ◽  
Plant Species Diversity ◽  
Soil Biota ◽  
Interactive Effects
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