Variation in tidal wetland plant diversity and composition within and among coastal estuaries: assessing the relative importance of environmental gradients

2013 ◽  
Vol 25 (2) ◽  
pp. 534-545 ◽  
Author(s):  
Christopher N. Janousek ◽  
Christina L. Folger
Keyword(s):  
Plant Diversity ◽  
Environmental Gradients ◽  
Tidal Wetland ◽  
Relative Importance ◽  
Wetland Plant

scholarly journals Seasonal impoundment alters patterns of tidal wetland plant diversity across spatial scales

Ecosphere ◽  
2021 ◽  
Vol 12 (2) ◽  
Author(s):  
Scott F. Jones ◽  
Christopher N. Janousek ◽  
Michael L. Casazza ◽  
John Y. Takekawa ◽  
Karen M. Thorne
Keyword(s):  
Plant Diversity ◽  
Spatial Scales ◽  
Tidal Wetland ◽  
Wetland Plant

scholarly journals Indirect drivers of plant diversity-productivity relationship in semiarid sandy grasslands

2012 ◽  
Vol 9 (4) ◽  
pp. 1277-1289 ◽  
Author(s):  
X. A. Zuo ◽  
J. M. H. Knops ◽  
X. Y. Zhao ◽  
H. L. Zhao ◽  
T. H. Zhang ◽  
...  
Keyword(s):  
Environmental Factors ◽  
Plant Diversity ◽  
Structural Equation ◽  
Environmental Gradients ◽  
Northern China ◽  
Equation Modeling ◽  
Vegetation Composition ◽  
Wet Meadow ◽  
Positive Correlation ◽  
Sandy Grasslands

Abstract. Although patterns between plant diversity and ecosystem productivity have been much studied, a consistent relationship has not yet emerged. Differing patterns between plant diversity and productivity have been observed in response to spatial variability of environmental factors and vegetation composition. In this study, we measured vegetation cover, plant diversity, productivity, soil properties and site characteristics along an environmental gradient (mobile dune, semi-fixed dune, fixed dune, dry meadow, wet meadow and flood plain grasslands) of natural sandy grasslands in semiarid areas of northern China. We used multivariate analysis to examine the relationships between environmental factors, vegetation composition, plant diversity and productivity. We found a positive correlation between plant diversity and productivity. Vegetation composition aggregated by the ordination technique of non-metric multidimensional scaling had also a significantly positive correlation with plant diversity and productivity. Environmental gradients in relation to soil and topography affected the distribution patterns of vegetation composition, species diversity and productivity. However, environmental gradients were a better determinant of vegetation composition and productivity than of plant diversity. Structural equation modeling suggested that environmental factors determine vegetation composition, which in turn independently drives both plant diversity and productivity. Thus, the positive correlation between plant diversity and productivity is indirectly driven by vegetation composition, which is determined by environmental gradients in soil and topography.

scholarly journals Shifts in the relative fitness contributions of fecundity and survival in variable and changing environments

2021 ◽  
Vol 224 (Suppl 1) ◽  
pp. jeb228031
Author(s):  
Lauren B. Buckley ◽  
Sean D. Schoville ◽  
Caroline M. Williams
Keyword(s):  
Environmental Conditions ◽  
Energy Use ◽  
Environmental Gradients ◽  
Relative Fitness ◽  
Relative Importance ◽  
Fitness Components ◽  
Climate Variability And Change ◽  
Short Term ◽  
Climate Gradients ◽  
Recent Climate

ABSTRACTOrganisms respond to shifts in climate means and variability via distinct mechanisms. Accounting for these differential responses and appropriately aggregating them is central to understanding and predicting responses to climate variability and change. Separately considering fitness components can clarify organismal responses: fecundity is primarily an integrated, additive response to chronic environmental conditions over time via mechanisms such as energy use and acquisition, whereas survival can be strongly influenced by short-term, extreme environmental conditions. In many systems, the relative importance of fecundity and survival constraints changes systematically along climate gradients, with fecundity constraints dominating at high latitudes or altitudes (i.e. leading range edges as climate warms), and survival constraints dominating at trailing range edges. Incorporating these systematic differences in models may improve predictions of responses to recent climate change over models that assume similar processes along environmental gradients. We explore how detecting and predicting shifts in fitness constraints can improve our ability to forecast responses to climate gradients and change.

Assessment of the Effects of Ornamental Wetland Polyculture Combinations on Urban Sewage Treatment

2021 ◽  
Author(s):  
Min Wang ◽  
Yujue Zhou ◽  
Lin Xiang ◽  
Xiaoyang Ke ◽  
Hui Zhang ◽  
...  
Keyword(s):  
Plant Diversity ◽  
Municipal Wastewater ◽  
Plant Biomass ◽  
Removal Rate ◽  
Sewage Treatment ◽  
Oxygen Demand ◽  
Wetland Plant ◽  
Urban Sewage ◽  
Thalia Dealbata ◽  
Cyperus Alternifolius

Abstract Previous studies have shown that wetland plants can treat wastewater in a cost-effective and sustainable way, however, the studies on the performance of ornamental wetland plant diversity in treating urban sewage were scarce. Therefore, this study was conducted to assess and select wetland polyculture combination that was effective in urban sewage treatment in subtropical areas. We formed five combinations out of six ornamental wetland plant species including Thalia dealbata, Cyperus alternifolius, Iris pseudacorus, Lythrum sastlicaria, Nymphaea tetragona, and Zantedeschia aethiopica. The growth state and removal effects of each plant combination were systematically measured and assessed. The results indicated all the combinations exhibited remarkable total nitrogen (TN), total phosphorus (TP), ammonium nitrogen (NH­4+-N), and chemical oxygen demand chromium (CODcr) removal rate of 70.75%-77.67%, 63.86%-73.71%, 69.73%-76.85%, and 57.28%-75.69%, respectively. Additionally, pH was reduced to 7.54-8.00 in the sewage. The purification effect reached the best during 30-36th day. The comprehensive assessment showed the mixture of Thalia dealbata + Cyperus alternifolius, closely followed by Thalia dealbata + Cyperus alternifolius+ Lythrum sastlicaria, was highly effective at extracting various pollutants, and both of them could be used as favorable combinations to convert eutrophication and purify municipal wastewater. Linear regression showed that TP, TP, NH­4+-N, and CODcr. were significantly related to plant biomass, indicating that plant biomass essential indicator for screening purification plants. Our study highlighted the importance of plant diversity in biological wastewater treatment, however the competition between plants was suggested to take into consideration in future studies.

scholarly journals Wetland Plant Diversity in a Coastal Nature Reserve in Italy: Relationships with Salinization and Eutrophication and Implications for Nature Conservation

2018 ◽  
Vol 41 (7) ◽  
pp. 2079-2091 ◽  
Author(s):  
Renato Gerdol ◽  
Lisa Brancaleoni ◽  
Lorenzo Lastrucci ◽  
Giovanni Nobili ◽  
Mauro Pellizzari ◽  
...  
Keyword(s):  
Nature Conservation ◽  
Plant Diversity ◽  
Nature Reserve ◽  
Wetland Plant

Fish assemblages in coastal lagoons in land-uplift succession: The relative importance of local and regional environmental gradients

2009 ◽  
Vol 81 (2) ◽  
pp. 247-256 ◽  
Author(s):  
Martin Snickars ◽  
Alfred Sandström ◽  
Antti Lappalainen ◽  
Johanna Mattila ◽  
Kajsa Rosqvist ◽  
...  
Keyword(s):  
Fish Assemblages ◽  
Environmental Gradients ◽  
Coastal Lagoons ◽  
Relative Importance ◽  
Land Uplift

Relative importance of environmental gradients and historical trawling effort in determining the composition and distribution of benthic macro-biota in a large inverse estuary

2011 ◽  
Vol 107 (1-3) ◽  
pp. 184-195 ◽  
Author(s):  
David R. Currie ◽  
Cameron D. Dixon ◽  
Shane D. Roberts ◽  
Graham E. Hooper ◽  
Shirley J. Sorokin ◽  
...  
Keyword(s):  
Environmental Gradients ◽  
Relative Importance ◽  
Inverse Estuary
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