The role of a spiny plant refuge in structuring grazed shortgrass steppe plant communities

Oikos ◽  
2002 ◽  
Vol 98 (1) ◽  
pp. 53-64 ◽  
Author(s):  
S. Rebollo ◽  
D. G. Milchunas ◽  
I. Noy-Meir ◽  
P. L. Chapman
Keyword(s):  
Plant Communities ◽  
Shortgrass Steppe ◽  
Steppe Plant ◽  
Steppe Plant Communities

Simulation of Disturbances and Recovery in Shortgrass Steppe Plant Communities

2008 ◽  
Author(s):  
Debra P. C. Peters ◽  
William K. Lauenroth
Keyword(s):  
Plant Community ◽  
Plant Communities ◽  
Shortgrass Steppe ◽  
Gap Dynamics ◽  
Community Recovery ◽  
Forest Models ◽  
Steppe Plant ◽  
Research Questions ◽  
Steppe Plant Communities

Simulation modeling is a complementary tool to field observation and experimentation in understanding ecological systems (Lauenroth et a l., 1998). The overall objective of our plant community modeling is to allow us to evaluate the importance of gap dynamics concepts of succession for understanding shortgrass plant community recovery after disturbances. A gap dynamics approach focuses on individual plants, and the interactions between disturbance characteristics and plant life history traits in explaining successional patterns (Watt, 1947). Simulation models have been used extensively to evaluate the importance of gap dynamics processes to short- and long-term vegetation dynamics in temperate and tropical forests (e.g., Botkin et al., 1972; Shugart, 1984). We developed a gap dynamics model for shortgrass steppe plant communities (STEPPE [Coffin and Lauenroth, 1990]) based upon the conceptual and modeling framework provided by forest models, modifying it to represent Great Plains grasslands (Coffin and Lauenroth, 1996; Coffin and Urban, 1993). We used STEPPE in several capacities: (1) to synthesize and integrate existing knowledge to improve our understanding of recovery processes after disturbance, (2) to identify key processes limiting recovery, and (3) to predict long-term recovery dynamics for different climate and disturbance characteristics—in particular, soil texture and disturbance size. Our approach to modeling shortgrass community dynamics was to incorporate only the most important processes needed to address specific research questions. We added processes through time either because the model did not sufficiently represent ecosystem dynamics or because we posed more complicated research questions. STEPPE simulates the recruitment, growth, and mortality of individual plants on a small plot through time at an annual time step (Fig. 7.1) (Coffin and Lauenroth, 1990). Recruitment and mortality both have stochastic elements. Growth is deterministic and is based upon competition for resources among plants. A key difference between STEPPE and the forest models from which it was derived is that belowground resources are the most frequently limiting resources in semiarid grasslands compared with aboveground resources (light) in forests (Lauenroth and Coffin, 1992).

Steppe plant communities on the chestnut soils of Western Transbaikalia: Biological diversity and productivity

2014 ◽  
Vol 4 (3) ◽  
pp. 178-186 ◽  
Author(s):  
M. G. Merkusheva ◽  
O. A. Anenkhonov ◽  
N. K. Badmaeva ◽  
S. B. Sosorova
Keyword(s):  
Plant Communities ◽  
Biological Diversity ◽  
Western Transbaikalia ◽  
Chestnut Soils ◽  
Steppe Plant ◽  
Steppe Plant Communities

Plant communities on solonetz and salinized soils of the Southern Ural

2003 ◽  
pp. 29-41 ◽  
Author(s):  
D. N. Karpov ◽  
T. M. Lysenko ◽  
V. B. Golub
Keyword(s):  
Plant Communities ◽  
Desert Plant ◽  
The South ◽  
Orenburg Region ◽  
Northern Kazakhstan ◽  
Steppe Plant ◽  
Steppe Plant Communities

A new set of data depicting plant communities on solonetz and salinized soils of the Southern Ural is given according to the Braun-Blanquet approach. The new alliance Poo bulbosae—Artemision pauciflorae which comprises associations on automorphic chestnut and chernozem solonetz soils, namely Poo bulbosae—Arte­misietum pauciflorae ass. nov., Puccinellio tenuissi­mae—Li­mo­nietum suffruticosi ass. nov., Leymo ramo­si—Arte­mi­sietum austriacae ass. nov., Festuco becke­ri—Ar­te­misie­tum lerchianae ass. nov., and Festuco valesiacae—Artemisietum austriacae ass. nov., is estab­lished. The alliance communities are spread in the south-easternmost part of the Bashkortostan Republic and the Orenburg region, as well as in the adjacent areas of the Northern Kazakhstan (Aktyubinsk and Kustanai regions). Viewed in the syntaxonomic space, this unit occupies the place between the classes Festuco-Puccinellietea Soó 1968 and Artemisietea lerchianae Golub 1994. Low standards of current syntaxonomic knowledge of steppe and desert plant communities of Russia and neighbouring countries make it difficult to determine of the alliance position in the system of higher syntaxa precisely. Some lower syntaxa of the all. Festuco-Limonion gmelinii Mirkin ex Golub et V. Solomakha 1988, uniting steppe plant communities on semiautomorphic solonetz soils of the Southern Ural, namely Puccinellietum tenuissimae artemisietosum lerchianae subass. nov., Stemmacantho serratuloidis—Puccinellietum dolicholepidis ass. nov., and Festuco pratensis—Artemisietum lerchianae ass. nov., are also described in the paper.

Soil morphology and organic matter dynamics under cheatgrass and sagebrush-steppe plant communities

2004 ◽  
Vol 57 (4) ◽  
pp. 445-466 ◽  
Author(s):  
Jay B Norton ◽  
Thomas A Monaco ◽  
Jeanette M Norton ◽  
Douglas A Johnson ◽  
Thomas A Jones
Keyword(s):  
Organic Matter ◽  
Plant Communities ◽  
Sagebrush Steppe ◽  
Soil Morphology ◽  
Organic Matter Dynamics ◽  
Steppe Plant ◽  
Steppe Plant Communities

Nitrogen deposition magnifies the sensitivity of desert steppe plant communities to large changes in precipitation

2019 ◽  
Vol 108 (2) ◽  
pp. 598-610 ◽  
Author(s):  
Quanhui Ma ◽  
Xiaodi Liu ◽  
Yibo Li ◽  
Lang Li ◽  
Hongying Yu ◽  
...  
Keyword(s):  
Nitrogen Deposition ◽  
Plant Communities ◽  
Desert Steppe ◽  
Steppe Plant ◽  
Steppe Plant Communities

scholarly journals PLANT COMMUNITIES WITH GLOBULARIA PUNCTATA LAPEYR. IN SAMARA REGION

2015 ◽  
Vol 4 (2) ◽  
pp. 115-120
Author(s):  
Anna Evgenyevna Mitroshenkova
Keyword(s):  
Plant Communities ◽  
Stable Condition ◽  
Steppe Zone ◽  
Green Paper ◽  
Ephedra Distachya ◽  
Linum Flavum ◽  
Festuca Valesiaca ◽  
Steppe Plant ◽  
Iris Pumila ◽  
Steppe Plant Communities

This article contains information about scientific research conducted steppe plant communities with Globularia punctata Lapeyr. in the Samara region. Given their ecological and phytotsenotichesky characteristics, geobotanical descriptions and geographical coordinates. Based on the research concludes that Globularia punctata Lapeyr. part of the Stipa lessingiana + Festuca valesiaca, Festuca valesiaca + Stipa pennata, Festuca valesiaca + Stipa pulcherrima and Herbae stepposae + Festuca valesiaca communities meadow steppe zone, where it presented a significant number of the population of individuals is in a stable condition, with well-defined developmental structure. In total, the communities with Globularia punctata Lapeyr. recorded 120 species of vascular plants, of which 21 (17,5%) are rare and are included in the Red Book of Samara Region (2007): Stipa pulcherrima K. Koch, Stipa pennata L., Hedysarum grandiflorum Pall., Hedysarum razoumowianum Fisch. Helm ex DC., Eremogone koriniaya (Fisch. ex Fenzl) Ikonn., Astragalus zingeri Korsh., Oxytropis floribunda (Pall.) DC., Scabiosa isetensis L., Ephedra distachya L., Alyssum lenense Adams, Adonis wolgensis DC., Silene baschkirorum Janisch., Jurinea ewersmannii Bunge, Aster alpinus L., Polygala sibirica L., Cotoneaster melanocarpus Fisch. ex Blytt, Iris pumila L., Galatella angustissima (Tausch) Novopokr., Linum flavum L., Campanula wolgensis P.A. Smirn. and Globularia punctate Lapeyr. The data obtained are recommended for use in the 2-nd edition of the Red Book of Samara region, community participation Globularia punctata Lapeyr. - for inclusion in the Green Paper of the Samara region, and described the territory - to select based on these natural monuments of regional significance.

scholarly journals ONTOGENETIC STRUCTURE AND ASSESSMENT OF POPULATIONS OF THYMUS KRYLOVII BYCZENNIKOVA IN MINUSA DISTRICT OF THE KRASNOYARSK TERRITORY

2018 ◽  
pp. 4-6
Author(s):  
A. L. Filimonova
Keyword(s):  
Developmental Biology ◽  
Plant Communities ◽  
Population Characteristics ◽  
Study Region ◽  
Fine Grained ◽  
Demographic Indicators ◽  
Ontogenetic Structure ◽  
Steppe Plant ◽  
The Stability ◽  
Steppe Plant Communities

The article presents the results of the study of ontogenetic structure and assessment of the state of coenopopulations of Thymus krylovii Byczennikova in steppe plant communities of Minusinsk district of Krasnoyarsk region. It was found that the ratio of individuals of different ontogenetic groups studied coenopopopulations normal, also incomplete. Ontogenetic spectra of the studied right-hand type cenopopulations with a maximum on individuals in the old generative ontogenetic state. According to the "Delta-omega" classification, the studied cenopopulations are aging. The obtained results on the developmental biology, ontogenetic structure and values of the main demographic indicators characterize the coenopopulations of Thymus krylovii Byczennikova as unstable. To evaluate the stability of populations in the study region. It is shown that their optimal state is achieved in these fine-grained steppes. Optimum is achieved mainly due to population characteristics.

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