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Model to assess the habitat suitability for endangered bird species: Brown Eared-pheasant Crossoptilon mantchuricum Swinhoe in Xiaowutaishan Reserve, China

100%

Li D., Gao S., Wu Y., Sun L., Guo S., Li J.

Polish Journal of Ecology

2008

tom 56

nr 4

723-729

Brown Eared-pheasant (Crossoptilon mantchuricum Swinhoe, 1863) is an endangered species endemic to China. Habitat management for Brown Eared-pheasant has to compensate the loss of natural forests and to improve their habitat quality. In this study, we applied a Habitat Suitability Index (HSI) model to analyze the habitat suitability and quality for the breeding populations of this species in Xiaowutaishan National Nature Reserve, North China. The Reserve (area 21833 ha) is located at 800–2882 m a.s.l. and high mountain and deep valley habitats as well as different types of mountain forest and alpine meadows occur there. We used six variables (vegetation type, canopy cover, altitude, exposure, slope gradient and position of slope) both in field observation and in the analysed model. According to the utilization rates of different habitat types by Brown Eared-pheasants, these variables were categorized into five classes (unsuitable, less suitable, moderately suitable, suitable, and highly suitable). Our results show that highly suitable, suitable, less suitable and unsuitable habitat accounted for 13.5%, 53%, 32%, and 1.5% of the entire reserve area, respectively. Our HSI model is well validated by the observed data. We expect this study can be useful as an example of successful model applying to the habitat management or population manipulation of the endangered species.

Genetic variability of Polish population of the Capercaillie Tetrao urogallus

84%

Rutkowski R., Nieweglowski H., Dziedzic R., Kmiec M., Gozdziewski J.

Acta Ornithologica

2005

tom 40

nr 1

27-34

The Capercaillie is one of the most seriously endangered bird species in Poland. It currently numbers around 650 individuals that live in four isolated populations (Lower Silesian Forest, Janów Lubelski Forest, Carpathians, Augustów Forest). This study investigated genetic variability based on the polymorphism of six microsatellite loci in the surviving Polish populations of the Capercaillie and compares the results with the analogous variability in two large, contiguous populations in Russia. The following parameters were estimated: mean number of alleles per locus, allelic richness, mean effective number of alleles per locus, heterozygosity in each of the populations investigated. Differentiation between pairs of populations was assessed using FST. The results show that despite some inevitable reduction in genetic variability, most of the Polish populations retained a substantial level of microsatellite polymorphism. Only in the population from Janów Lubelski Forest was there a significant reduction in variability, probably due to long isolation and the recent decline. That this population has long been isolated was also confirmed by the pronounced genetic differentiation from the other Polish populations. The Carpathian population of the Capercaillie was found to be genetically structured, and in the Lower Silesian Forest population heterozygosity was low, possibly as a result of the lek mating system and also the dramatic reduction in numbers.

Effects of forest management on three-toed Woodpecker Picoides tridactylus distribution in the Bialowieza Forest [NE Poland]: conservation implications

67%

Wesolowski T., Czeszczewik D., Rowinski P.

Acta Ornithologica

2005

tom 40

nr 1

53-60

Distribution of Three-toed Woodpeckers and that of dead wood were mapped in two fragments of the Białowieża National Park (BNP) differing in their management history — primeval (old-growth stands of natural origin, no human intervention) and logged (as the former but subject to 80 years of commercial forestry). Data were collected during the breeding seasons 1999-2001. In the end of April 2000, the whole BNP was systematically searched; playbacks of drumming were used to enhance detection of birds. Presence/absence of Three-toed Woodpeckers and of dead wood (standing and downed Norway spruces and snags of other trees) were recorded within each forest sub-compartments (ca. 28 ha). Data from censuses done in smaller plots in 1975-1999 showed that in the primeval forest the woodpeckers bred twice more frequently in swampy and coniferous forests than in the oak-hornbeam habitat. These preferred habitat types covered larger areas in the logged fragment than in the primeval part (66% vs. 41%). Yet despite this, Three-toed Woodpeckers were recorded there over twice less frequently (14% of 176 sub-compartments) than in the primeval (36% of 164 sub-compartments) part. These differences followed sharp contrasts in the dead wood availability; all but one sub-compartments in the primeval fragment contained some form of dead wood, whereas dead spruces were missing in almost 30% of sub-compartments in the logged part. This was the effect of continuous "sanitary" logging, purposeful removal of dying and dead spruces from the Forest. To restore Three-toed Woodpecker habitats it is necessary to ban removal of dead spruces in the managed part of BNP. However, the BNP area is too small, to assure the long-term survival of the Białowieża Forest population. To achieve this, it is necessary to resign from removal of dying and dead spruces in the whole Polish part of the Białowieża Forest (600 km²). This would create breeding habitat for a maximum 260-320 pairs.

Ograniczanie wyników

2 Acta Ornithologica

1 Polish Journal of Ecology

1 Czeszczewik D.

1 Dziedzic R.

1 Gao S.

1 Gozdziewski J.

1 Guo S.

1 Kmiec M.

1 Li D.

1 Li J.

1 Nieweglowski H.

1 Rowinski P.

1 Rutkowski R.

1 Sun L.

1 Wesolowski T.

1 Wu Y.

1 2008

2 2005

Wyniki wyszukiwania

Model to assess the habitat suitability for endangered bird species: Brown Eared-pheasant Crossoptilon mantchuricum Swinhoe in Xiaowutaishan Reserve, China

Genetic variability of Polish population of the Capercaillie Tetrao urogallus

Effects of forest management on three-toed Woodpecker Picoides tridactylus distribution in the Bialowieza Forest [NE Poland]: conservation implications