scholarly journals Unravelling the bacterial diversity found in the semi-arid Tablas de Daimiel National Park wetland (central Spain)

2010 ◽  
Vol 59 ◽  
pp. 33-44 ◽  
Author(s):  
G D’Auria ◽  
MM Barón-Rodríguez ◽  
A Durbán-Vicente ◽  
A Moya ◽  
C Rojo ◽  
...  
Keyword(s):  
Bacterial Diversity ◽  
National Park ◽  
Central Spain ◽  
Semi Arid

scholarly journals Estimating abundance of the Endangered onager Equus hemionus onager in Qatruiyeh National Park, Iran

Oryx ◽  
2013 ◽  
Vol 47 (2) ◽  
pp. 266-272 ◽  
Author(s):  
Mahmoud-Reza Hemami ◽  
Moslem Momeni
Keyword(s):  
Growth Rate ◽  
Protected Area ◽  
National Park ◽  
Natural Populations ◽  
Distance Sampling ◽  
Line Transect ◽  
Management Interventions ◽  
Equus Hemionus ◽  
Wild Ass ◽  
Semi Arid

AbstractHistorically, the onager or Persian wild ass Equus hemionus onager, endemic to Iran, was widespread on the arid and semi-arid central steppes but only two natural populations remain. We estimated the population density of the onager in Qatruiyeh National Park using line transect distance sampling. Transects were surveyed on three plains in the Park and the results compared with total counts conducted by the Department of Environment. Our estimate (109 onagers per 100 km2; 95% confidence interval 67–179) is similar to that obtained by the total counts (137 onagers per 100 km2). Distance sampling is therefore a promising method for estimating the abundance of the onager. Using the annual censuses performed by the Department of Environment over the last 13 years we estimated that the population has a growth rate of 0.09. During the same period the onager population in the Touran Protected Complex has experienced a severe decline. The high density of onagers within the National Park indicates the unsuitability of adjacent habitats, including Bahram-e-Goor Protected Area, for this species. Lack of sufficient security and poorly distributed water sources appear to be the main reasons discouraging onagers from entering the Bahram-e-Goor Protected Area. We recommend and describe management interventions that could potentially assist in maintaining the last surviving onager populations in Iran.

The Impact of Herbivores on Regeneration in Four Trees From Arid Australia.

1995 ◽  
Vol 17 (2) ◽  
pp. 213 ◽  
Author(s):  
TD Auld
Keyword(s):  
Survival Data ◽  
National Park ◽  
Survival Rates ◽  
Ground Level ◽  
High Survival ◽  
Grazing Land ◽  
The Impact ◽  
Acacia Ligulata ◽  
Semi Arid ◽  
Survival Of Seedlings

The size distributions of populations of four semi-arid perennial trees were investigated within Kinchega National Park in western NSW. For Acacia ligulata, A, loderi and Alectryon oleifolius, it appears that regeneration has been eliminated or at best severely limited at most sites. Some regeneration has occurred through recruitment of vegetative suckers in Casuarina pauper. Currently these vegetative recruits have high survival rates under both rabbit and kangaroo grazing, although such grazing frequently reduces the height of vegetative suckers back to ground level. Survival of seedlings of Acacia ligulata was very limited, with highest survival when mammals were excluded. There was no survival of seedlings of Casuarina pauper in the presence of rabbits and survival was poor when rabbits were excluded. Many seedlings of both species die through desiccation. The survival data from seedlings and vegetative suckers reinforce the patterns observed in the size distribution of populations. Within Kinchega National Park, control of rabbits is essential to initiate regeneration. A reduction in the total grazing pressure (especially rabbits, sheep, cattle and goats) is necessary in critical dry periods on semi-arid and arid grazing land if regeneration of perennials is to be encouraged.

scholarly journals Vegetation and fire dynamics during the last 4000 years in the Cabañeros National Park (central Spain)

2018 ◽  
Vol 253 ◽  
pp. 110-122 ◽  
Author(s):  
César Morales-Molino ◽  
Daniele Colombaroli ◽  
Willy Tinner ◽  
Ramón Perea ◽  
María Valbuena-Carabaña ◽  
...  
Keyword(s):  
National Park ◽  
Central Spain ◽  
Fire Dynamics

Daily changes in plant water content in western Queensland: implications for red kangaroo foraging times

2004 ◽  
Vol 26 (1) ◽  
pp. 102 ◽  
Author(s):  
S. Underhill ◽  
G. C. Grigg ◽  
D. J. Yates
Keyword(s):  
Water Content ◽  
National Park ◽  
Plant Water ◽  
Forage Plants ◽  
Red Kangaroo ◽  
Macropus Rufus ◽  
Daily Changes ◽  
Semi Arid

We measured daily changes in plant water content to see if red kangaroos (Macropus rufus), in foraging at night, may gain more water than foraging by day. If so, it could be influential in dictating their time of foraging. The study was stimulated by work in Africa which showed that, by choosing to feed at night, gazelles are able to take advantage of increased plant water content. Daily changes in water content of 15 known forage plants were examined at Idalia National Park in semi-arid western Queensland in February, April and July 2002, during progressive drying of the country in an extraordinarily dry year. Of 29 day-night comparisons of plant water content, thirteen showed no difference, two (both of red spinach, Trianthema triquetra) showed a substantial increase at night, eight showed small but statistically significant increases, and six showed small but statistically significant decreases. We conclude that the choice of red kangaroos to forage at night is unlikely to be explained by nightly increases in plant water content.

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