Long-Term Temporal and Spatial Dynamics of Food Availability for Endangered Mountain Gorillas in Volcanoes National Park, Rwanda

2012 ◽  
Vol 75 (3) ◽  
pp. 267-280 ◽  
Author(s):  
CYRIL C. GRUETER ◽  
FERDINAND NDAMIYABO ◽  
ANDREW J. PLUMPTRE ◽  
DIDIER ABAVANDIMWE ◽  
ROGER MUNDRY ◽  
...  
Keyword(s):  
Food Availability ◽  
National Park ◽  
Spatial Dynamics ◽  
Mountain Gorillas ◽  
Temporal And Spatial

scholarly journals Spatial and temporal differences in the fish assemblage structure in a subtropical estuary

2020 ◽  
Vol 48 (1) ◽  
pp. 74-84
Author(s):  
André P. Cattani ◽  
Gisela C. Ribeiro ◽  
Mauricio Hostim-Silva ◽  
Marcelo Soeth ◽  
Leandro Clezar ◽  
...  
Keyword(s):  
Food Availability ◽  
Fish Assemblage ◽  
Spatial Dynamics ◽  
River Estuary ◽  
Fish Assemblage Structure ◽  
Southern Brazil ◽  
Pomatomus Saltatrix ◽  
Subtropical Estuary ◽  
Micropogonias Furnieri ◽  
Temporal And Spatial

A large number of fish species use the mangrove mainly due to food availability and protection against predators. The knowledge of temporal and spatial dynamics of ichthyofauna allows us to identify patterns of occupation of this ecosystem and to support the assessment and preservation of local biodiversity. In this sense, samplings were conducted in 1988 at five areas of the Itacorubi River estuary, Santa Catarina Island. A total of 3,883 specimens were collected, distributed in 21 families and 41 species with the predominance of Cetengraulis edentulus, Mugil liza, Mugil curema, Genidens genidens, Mugil gaimardianus, Eucinostomus gula, Micropogonias furnieri, Pomatomus saltatrix and Sphoeroides testudineus. On average, abundances differed between seasons and sampled areas. Differences were detected between the fish faunas of fall and winter compared to summer and spring and between sampling sites. This study identified a fish assemblage in the mangrove of the Itacorubi River with a similar structure to other estuaries of southern Brazil.

scholarly journals Temporal and spatial dynamics in large rivers : example of a long-term monitoring of the middle Rhone River

2001 ◽  
Vol 37 (3) ◽  
pp. 237-251 ◽  
Author(s):  
J.-F. Fruget ◽  
M. Centofanti ◽  
J. Dessaix ◽  
J.-M. Olivier ◽  
J.-C. Druart ◽  
...  
Keyword(s):  
Spatial Dynamics ◽  
Large Rivers ◽  
Rhône River ◽  
Rhone River ◽  
Long Term Monitoring ◽  
Temporal And Spatial ◽  
Term Monitoring

scholarly journals Long-term collapse in fruit availability threatens Central African forest megafauna

Science ◽  
2020 ◽  
Vol 370 (6521) ◽  
pp. 1219-1222
Author(s):  
Emma R. Bush ◽  
Robin C. Whytock ◽  
Laila Bahaa-el-din ◽  
Stéphanie Bourgeois ◽  
Nils Bunnefeld ◽  
...  
Keyword(s):  
Food Availability ◽  
Body Condition ◽  
National Park ◽  
Fruit Availability ◽  
Forest Elephants ◽  
Lope National Park ◽  
Tree Reproduction

Afrotropical forests host much of the world’s remaining megafauna, although these animals are confined to areas where direct human influences are low. We used a rare long-term dataset of tree reproduction and a photographic database of forest elephants to assess food availability and body condition of an emblematic megafauna species at Lopé National Park, Gabon. Our analysis reveals an 81% decline in fruiting over a 32-year period (1986–2018) and an 11% decline in body condition of fruit-dependent forest elephants from 2008 to 2018. Fruit famine in one of the last strongholds for African forest elephants should raise concern about the ability of this species and other fruit-dependent megafauna to persist in the long term, with potential consequences for broader ecosystem and biosphere functioning.

scholarly journals Temporal and spatial dynamics of insular Rusa deer and wild pig populations in Komodo National Park

2016 ◽  
Vol 97 (6) ◽  
pp. 1652-1662 ◽  
Author(s):  
Achmad Ariefiandy ◽  
David M. Forsyth ◽  
Deni Purwandana ◽  
Jeri Imansyah ◽  
Claudio Ciofi ◽  
...  
Keyword(s):  
National Park ◽  
Spatial Dynamics ◽  
Temporal And Spatial ◽  
Wild Pig

Temporal and spatial dynamics of pulse production in India

2017 ◽  
Author(s):  
International Food Policy Research Institute (IFPRI)
Keyword(s):  
Spatial Dynamics ◽  
Temporal And Spatial ◽  
Pulse Production

Gran Paradiso: Erkenntnisse aus der sich natürlich regulierenden Steinbockpopulation|Gran Paradiso: Conclusions from the naturally regulated Capricorn population

2007 ◽  
Vol 158 (11) ◽  
pp. 349-352
Author(s):  
Grégory Amos ◽  
Ambroise Marchand ◽  
Anja Schneiter ◽  
Annina Sorg
Keyword(s):  
Nineteenth Century ◽  
Population Density ◽  
National Park ◽  
Optimal Management ◽  
Capra Ibex ◽  
Large Fluctuations ◽  
The Alps ◽  
Gran Paradiso ◽  
Gran Paradiso National Park

The last Capricorns (Capra ibex ibex) in the Alps survived during the nineteenth century in the Aosta valley thanks to the royal hunting reservation (today Gran Paradiso national park). Capricorns from this reservation were successfully re-introduced in Switzerland after its Capricorn population had disappeared. Currently in Switzerland there are 13200 Capricorns. Every year 1000 are hunted in order to prevent a large variation and overaging of their population and the damage of pasture. In contrast, in the Gran Paradiso national park the game population regulates itself naturally for over eighty years. There are large fluctuations in the Capricorn population (2600–5000) which are most likely due to the climate, amount of snow, population density and to the interactions of these factors. The long-term surveys in the Gran Paradiso national park and the investigations of the capacity of this area are a valuable example for the optimal management of the ibexes in Switzerland.

scholarly journals Large-Scale Analysis of the Spatiotemporal Changes of Net Ecosystem Production in Hindu Kush Himalayan Region

2021 ◽  
Vol 13 (6) ◽  
pp. 1180
Author(s):  
Da Guo ◽  
Xiaoning Song ◽  
Ronghai Hu ◽  
Xinming Zhu ◽  
Yazhen Jiang ◽  
...  
Keyword(s):  
Large Scale ◽  
Net Primary Production ◽  
Carbon Sink ◽  
Carbon Sources ◽  
Spatial Dynamics ◽  
Tibet Plateau ◽  
Geostatistical Model ◽  
Hindu Kush ◽  
Temporal And Spatial ◽  
The Difference

The Hindu Kush Himalayan (HKH) region is one of the most ecologically vulnerable regions in the world. Several studies have been conducted on the dynamic changes of grassland in the HKH region, but few have considered grassland net ecosystem productivity (NEP). In this study, we quantitatively analyzed the temporal and spatial changes of NEP magnitude and the influence of climate factors on the HKH region from 2001 to 2018. The NEP magnitude was obtained by calculating the difference between the net primary production (NPP) estimated by the Carnegie–Ames Stanford Approach (CASA) model and the heterotrophic respiration (Rh) estimated by the geostatistical model. The results showed that the grassland ecosystem in the HKH region exhibited weak net carbon uptake with NEP values of 42.03 gC∙m−2∙yr−1, and the total net carbon sequestration was 0.077 Pg C. The distribution of NEP gradually increased from west to east, and in the Qinghai–Tibet Plateau, it gradually increased from northwest to southeast. The grassland carbon sources and sinks differed at different altitudes. The grassland was a carbon sink at 3000–5000 m, while grasslands below 3000 m and above 5000 m were carbon sources. Grassland NEP exhibited the strongest correlation with precipitation, and it had a lagging effect on precipitation. The correlation between NEP and the precipitation of the previous year was stronger than that of the current year. NEP was negatively correlated with temperature but not with solar radiation. The study of the temporal and spatial dynamics of NEP in the HKH region can provide a theoretical basis to help herders balance grazing and forage.

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