scholarly journals A permanent field laboratory in the Pollino National Park: vegetation dynamics in mountain herbaceous communities

2014 ◽  
pp. 125-133
Author(s):  
Domenico Gargano ◽  
Antonella Bonacci ◽  
Giuseppe De Vivo ◽  
Vittoria Marchianò ◽  
Aldo Schettino ◽  
...  
Koedoe ◽  
2003 ◽  
Vol 46 (1) ◽  
Author(s):  
M.H.T. Hipondoka ◽  
W.D. Versfeld

In 1984, a ground-based, photographic library was initiated for monitoring the vegetation dynamics in Etosha National Park. Over 400 photographic points were selected. At these points, panchromatic photographs were taken at intervals of six years. This study was undertaken to assess the applicability of this terrestrial photographic library in characterising the dynamics of the vegetation structure in south-central Etosha National Park. The methods employed include field validation, visual photograph interpretations, spatial analysis, and aggregated two-dimensional tables. Results, though patchy in nature, show that the vegetation structure at 63 % of the sites covered remained either unchanged or increased over the 15-year study period. The patchiness of the photo points can be exploited and be treated as training sites for corresponding satellite image classifications to provide continuous ground coverage results.


Remote sensing and GIS based vegetation monitoring offers lot of potential for ecosystem studies. This study utilized freely available moderate resolution Landsat images to quantify the changes in vegetation dynamics in Dibru-Saikhowa national park, India. A wide range of vegetation indices and temperature indices such as normalized difference vegetation index (NDVI), land surface temperature (LST), vegetation condition index (VCI), temperature condition index (TCI) and vegetation health index (VHI) was utilized for the purpose of the study. Results reveal that the study area has gone through changes in vegetation and temperature pattern affecting the land surface balances. The maximum NDVI value for the year 1996 was recorded between 0.5-0.8 whereas the maximum LST values ranged between 17.240C-34.850C. In 2019, the maximum NDVI values reduced to the range of 0.14-0.6 while LST increased to 18.950C-38.910C. Consequently, the VHI classes showed a negative trend. In 1996, healthy vegetation covered a total area of 14564.6 ha which reduced to 9872.1 ha in 2019. Conversely, the no vegetation class showed a significant positive trend from 951.3 ha to 3015.99. Such alteration in vegetation dynamics in the study area is affecting the local climate and regional ecosystem services and require instant attention of conservationist and policy makers


2019 ◽  
Vol 62 (1) ◽  
pp. 27-37
Author(s):  
Jowita DROHOJOWSKA ◽  
◽  
Anna KLASA ◽  

The paper lists psyllids (Hemiptera: Psylloidea) found in and around the Ojców National Park and discusses some selected species. Of the 46 confirmed species, representing the families Aphalaridae, Liviidae, Psyllidae and Triozidae, 44 are reported for the first time from the Ojców National Park. The largest group of psyllids is constituted by taxons related to forests and meadow and herbaceous communities. The following species are of particular interest. Craspedoplepta flavipennis (Foerster, 1848), a species characteristic of montane and subalpine altitudes, has its northern limit in Poland. The boreal-upland Cacopsylla nigrita (Zetterstedt, 1828) and Craspedoplepta malachitica (Dahlbom, 1851) are considered to be typical steppe species in Poland.


Koedoe ◽  
2002 ◽  
Vol 45 (1) ◽  
Author(s):  
U. Pond ◽  
B.B. Beesley ◽  
L.R. Brown ◽  
H. Bezuidenhout

As part of a larger project to assess the vegetation dynamics and conservation potential of the enlarged Mountain Zebra National Park, a checklist was produced to determine the plant species richness for this area. Six hundred and eighty species, represented by 333 genera and 87 families were identified. One hundred and eighty species belong to the Monocotyledoneae and 479 species to the Dicotyledoneae. By far the largest families are the Asteraceae with 129 and the Poaceae with 82 species. Thirteen Red Data species were recorded. A number of fynbos elements were encountered, the most noteworthy being two families endemic to the Cape Floristic Region, the Penaeaceae and Grubbiaceae. A very high species to square kilometre ratio of 5.05 supports the area’s rich floristic composition.


1994 ◽  
Vol 42 (5) ◽  
pp. 555 ◽  
Author(s):  
LT Bennett

The distribution of selected vegetation types on the Yanakie Isthmus, Wilson's Promontory National Park, was mapped from aerial photographs from 1941, 1972 and 1987. The main changes in the vegetation dynamics were: (1) an expansion of Leptospevmum laevigatum into grasslands and into Banksia integrifolia woodlands with herbaceous understoreys, and (2) a stabilisation of dunes by shmbs dominated by Leptospennum laevigatum. The total area of L. laevigatum shrubland and scrub increased from 2179 ha in 1941 to 3436 ha in 1972 and 4516 ha in 1987. Land-use changes in this period included the exclusion of fire in the early 1970s, after a history of regular burning, and an increase in grazing pressure primarily due to population expansions of the rabbit and the eastern grey kangaroo. Fire was not a prerequisite of the L. laevigatum expansion on the Isthmus because the spread continued after fire was excluded; nor was fire the primary cause of the expansion because the percentage yearly increase in the area of L. laevigatum was, on average, similar before and after 1972. An increase in grazing pressure was identified as the probable cause of the L. laevigatum expansion due to: (1) the exposure of bare ground, and (2) the restriction of the feeding range of cattle (known to graze both L. laevigatum and Acacia sophorae on the Isthmus).


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