scholarly journals Obedska bara and its effect on water regime in "Kupinske Grede"

2008 ◽  
pp. 187-195 ◽  
Author(s):  
Ljubomir Letic ◽  
Vojislav Djekovic ◽  
Branislava Mihajlovic

This paper deals with the effect of water regime of the protected area Obedska Bara on water regime of the forest ecosystem surrounded on three sides by pool-marsh ecosystem and on the fourth side by the river Sava. The research started in 2000 and is still underway, but we present only the period 2001-2005. The study results elucidate the very complex relationships of the water regimes of Obedska Bara and the river Sava, as well as their effect on the survival and development of the forest ecosystem of MU "Kupinske Grede", also the protected area under special form of protection.

2006 ◽  
pp. 105-119 ◽  
Author(s):  
Ljubomir Letic ◽  
Petar Ivanisevic ◽  
Savo Roncevic

The effect of water regime on the growth and development of plantations of hydrologically conditioned species, poplars was researched in the alluvial plain of the river Tamis. The investigations were carried out during the period 2000-2003 on the area of FA "Opovo", KO Sakule, and the study results elucidate the very complex relationships between the hydrological conditions of the site and the growth and increment of the study poplar plantations, cl. I-214. .


1998 ◽  
Vol 130 (6) ◽  
pp. 853-857
Author(s):  
Robin Naidoo ◽  
Martin J. Lechowicz

AbstractWe assessed the robustness of a standard classification of foliage suitability of North American tree species to the gypsy moth (Lymantria dispar L.) for tree species of southern Quebec grown under contrasting water regimes. Dispersal trials for 1st-instar larvae and feeding trials for 4th-instar larvae were conducted to determine whether water regime and (or) maternal effects influenced the preference or avoidance of gypsy moth larvae for foliage from saplings of native tree species of Quebec. We found no effect of water regime on the suitability of foliage to 1st-instar larvae and no effect of water regime and maternal effects for 4th-instar larvae. The standard classification scheme used by U.S. Department of Agriculture researchers in the United States was generally robust to the above factors, and thus suitable for use in southern Quebec.


1999 ◽  
Vol 40 (3) ◽  
pp. 233-240 ◽  
Author(s):  
S. G. T. Giovannini ◽  
D. M. L. da Motta Marques

The behavior of three emergent aquatic macrophytes under different water regimes was studied with the aim of achieving reconvertion of degraded wetlands and wetland construction for water quality improvement. Scirpus californicus, Typha subulata and Zizaniopsis bonariensis establishment was evaluated under a split plot design, in a factorial experiment with three levels of a water regime factor over a subsoil substratum. The stagnant 10±2 cm water level was best suited to T. subulata and Z. bonariensis development and S. californicus developed better at oscillating water level (3±2 cm) with flooding at 48 hour intervals. The morphological response variables (thickness and width at half length of the tallest leaf or stem per plant, height of tallest leaf or stem per plant, number of green leaves or stems and number of shoots per plant, and survival of propagules' original leaves or stems) were satisfactory descriptors to differentiate (p<0.1%) growth of above ground parts as related to water regimes and species. The three species did survive satisfactory in subsoil-like substratum under the tested water regimes. Mortality was in the worse case, 17.2%, 36.7%, and 9.4% for S. californicus, T. subulata, and Z. bonariensis, respectively. Although Z. bonariensis growth was very poor, only S. californicus and T. subulata could be indicated for planting under similar limiting conditions.


Author(s):  
João V. R. S. Souza ◽  
Lin Chau Ming ◽  
Marcos A. L. Santos ◽  
James E. Simon ◽  
Hector R. Juliani ◽  
...  

1984 ◽  
Vol 8 (3) ◽  
pp. 136-149 ◽  
Author(s):  
Donal D. Hook

Abstract Many tree species in the South are adapted to periodic and/or prolonged soil waterlogging. However, artificial disturbances of natural water regimes sometimes cause flooding to occur at abnormal times or the flood water to be deeper and waterlogging longer in duration than is normal. As a consequence, it is difficult for forest managers to predict how a species will respond to such disturbances or to decide how to manage an area where the water regime has been significantly altered. This paper discusses some factors which influence the waterlogging tolerance of tree species, compiles several classification systems, indicates the pertinent literature, and offers a new relative waterlogging-tolerance rating for southern lowland tree species.


1996 ◽  
Vol 26 (3) ◽  
pp. 422-427 ◽  
Author(s):  
David G. Herr ◽  
Luc C. Duchesne

Soil monoliths were used to determine the effects of organic horizon removal, ash, water regime, and shading on red pine (Pinusresinosa Ait.) seedling emergence. Soil monoliths were collected from a jack pine (Pinusbanksiana Lamb.) stand and taken to the laboratory for prescribed burning, leading to 25%, 50%, 75%, and 100% organic horizon removal. One half of each monolith contained ash generated from burning, while the other half was kept ash-free. Each half of every monolith was sown with red pine seeds. The monoliths were then placed in a greenhouse and, in separate experiments, were exposed to different water regimes and shade regimes. Red pine seedling emergence was highest under high water regimes, increased shade regimes, and increased organic horizon removal. Seedling emergence was reduced by the presence of ash.


Author(s):  

Results of calculations and forecast of water consumption in the Dongnai River (Vietnam) for the period till 2020 are discussed. The analysis, the water regime forecast and water consumption optimization are considered the basis for sustainable water use formation and attaining of water resources use effectiveness in the Vietnam’s national economy providing securing of environmental safety, particularly, necessary hydrological conditions for preservation of the mangrove forest ecosystem of the «Kanzio» specially protected natural territory near the river’s mouth.


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