Interspecific Competition for Space Between Wetland Plants with Clonal Growth

Zonation along a water level is the main spatial distribution characteristic of wetland plants. This is mainly because of the influences of hydrological conditions and interspecific competition, which finally narrow the fundamental niche of a species to its realized niche. In the present study, a controlled experiment was conducted in order to analyze the relationship between Carex lasiocarpa/Carex pseudocuraica and Glyceria spiculosa, in conditions of three competitive treatments at four water levels. The results showed that in no competition, C. lasiocarpa preferred low water levels, but this preference receded when competing with G. spiculosa. In contrast, C. pseudocuraica had greater preference for low water level when competing with G. spiculosa. The root/shoot ratios of the two Carex species decreased with increasing water levels, but they were almost unaffected by different competition treatments. With the increase in water level during full competition with G. spiculosa, the competitive ability of C. lasiocarpa showed an increasing trend, whereas a contrary trend was observed in C. pseudocuraica. Our results suggested the effects of water levels and their interactions with interspecific competition varied between the two Carex species and played an important role in determining spatial distribution patterns and potential community succession of wetland plants.

Download Full-text

Interspecific competition for space by hydroids and a sea anemone living on gastropod shells inhabited by hermit crabs

Marine Ecology Progress Series ◽

10.3354/meps028241 ◽

1986 ◽

Vol 28 ◽

pp. 241-244 ◽

Cited By ~ 5

Author(s):

WR Brooks ◽

RN Mariscal

Keyword(s):

Interspecific Competition ◽

Sea Anemone ◽

Hermit Crabs ◽

Competition For Space

Download Full-text

Response To Con- and Heterospecific Male Odours By the Voles Micro Tus a Grestis, M. Arvalis and Clethrionomys Glareolus With Respect To Competition for Space

Behaviour ◽

10.1163/156853980x00276 ◽

1980 ◽

Vol 73 (3-4) ◽

pp. 277-302 ◽

Cited By ~ 14

Author(s):

Gerrit De Jonge

Keyword(s):

Interspecific Competition ◽

Home Cage ◽

The Other ◽

Clethrionomys Glareolus ◽

Microtus Agrestis ◽

Heterospecific Male ◽

Competition For Space ◽

Per Se

AbstractAdults of Microtus agrestis, M. arvalis and Clethrionomys glareolus were offered the opportunity to explore an experimental alley, a section of which contained male odours of either of the three species. Neither of the species explored one of the sections of the alley more than the other one if the choice was between a section with conspecific odour and a non-odorous section. Both M. agrestis and C. glareolus preferred the non-odorous section when the choice was between M. arvalis odour and a non-odorous section. If an encounter with another vole was arranged in the alley before the opportunity was given to explore the partly odorous alley, then some additional avoiding responses to odours were assessed. M. agrestis now avoided both alien male conspecific odours and its own home cage odours. M. arvalis now avoided both the odours of C. glareolus and M. agrestis. Other responses to odours were not affected by an encounter. An encounter per se did not lead a vole to avoid the place where it had taken place. The survival value and the possible role of the avoiding tendencies in intra- and interspecific competition for space are discussed. Probably, odour avoidance is only an additional way in the communication between voles.

Download Full-text

Behavioral Suppression of Spawning in Largemouth Bass by Interspecific Competition for Space within Spawning Areas

Transactions of the American Fisheries Society ◽

10.1577/1548-8659(1976)105<682:bsosil>2.0.co;2 ◽

1976 ◽

Vol 105 (6) ◽

pp. 682-685 ◽

Cited By ~ 5

Author(s):

Stephen Lee Smith

Keyword(s):

Interspecific Competition ◽

Largemouth Bass ◽

Competition For Space ◽

Behavioral Suppression ◽

Spawning Areas

Download Full-text

Aspects saisonniers de la fixation de l’épifaune benthique de l’étage infralittoral de l’estuaire du Saint-Laurent

Journal of the Fisheries Research Board of Canada ◽

10.1139/f73-149 ◽

1973 ◽

Vol 30 (7) ◽

pp. 867-880 ◽

Cited By ~ 9

Author(s):

E. Bourget ◽

G. Lacroix

Keyword(s):

Interspecific Competition ◽

Salinity Gradient ◽

Settlement Period ◽

Competition For Space ◽

Polydora Ciliata ◽

June July ◽

Autumn And Winter ◽

Balanus Balanoides ◽

Hydrodynamic Factors ◽

Hard Substrata

This work conducted during two seasons (May–October 1969, 1970) was designed to study the dynamic aspects of the settlement of benthic epifauna on hard substrata. The stations were distributed on a 200-km distance, the salinity gradient ranging from 15 to 27‰. Although over 60 species were identified on the plates, the analysis shows that only three of these are abundant: Polydora ciliata, Balanus balanoides, and Balanus crenatus. In general, the settlement period of the species is very short and most of the settling processes are concentrated in June, July, and August. The populations reached a peak of abundance during settlement and decreased regularly afterwards. This decrease is due mainly to intraspecific and interspecific competition for space, accumulation of sediment, and hydrodynamic factors in autumn. The marked physical seasonality of this subarctic environment, more than true biotic succession, is reflected in the development of the community: during the summer, the community is biologically accommodated, whereas in autumn and winter it is physically controlled.

Download Full-text