In the last decades there was a drastic decrease in Gran Paradiso National Park ibex population linked with a reduction of stable occupied territories. Causes are still not completely clear but drastic decline is in partly related to recent climate changes. The objectives of this work are: (1) understand ibex distribution in GPNP in 1985-2009 period and describe livestock distribution in the same area in 2000-2009; (2) assess relation between distribution pattern and ibex population trend in 2000-2009. To understand distribution patterns 5 landscape ecology metrics are been selected to assess the composition and spatial configuration of occupied areas. Spearman’s rank correlation coefficient was used to test composition and configuration metric trends and their relation with ibex population size. Results showed a reduction of ibex occupied territories from 4,587.50 hectares in 1985 to 2,331.25 ha in 2009 (r =-0,818; P<0,001). Number of patches increased from 130 to 224 units (r s s =0,784; P<0,001). Livestock distribution didn’t show a particular trend (r s 2 S), ammonia (NH 3 ), carbon monoxide (CO), and carbon dioxide (CO 4 types of floating covers were tested: light expanded clay aggregate (leca), peat, sunflower oil, sawdust, straw, and plastic film. The manure was stored at 5, 15, and 25 °C for 37 d. Gaseous emissions were measured from headspaces of dynamic chambers. The results of our study showed that both the covering and temperature have a noticeable impact on gas emission from pig liquid manure. The plastic film cover was the most efficient at all temperatures tested, because it reduced the emissions of all measured gases. In this instance, average emission reductions were: CH 4 91.5% (P<0.01), NO 92.0% (P<0.05), H 2 ≈0 or P>0,05). The relation between changes in ibex population trend and distribution patterns was not proven (all P>0,005). These results suggest that probably ibex distribution was influenced by different combined factors (landscape changes, climate change, anthropic activities) and they show how landscape ecology approach may become an useful tool to understand the degree of fragmentation and connectivity of landscape defined on species distribution. In conclusion, the understanding of processes behind Alpine ungulates distribution have to consider the influence of landscape patterns on environmental processes to improve the conservation efforts at management level.

Preliminary study on Alpine ibex (Capra ibex ibex, L.) and livestock distribution in Gran Paradiso National Park / M. Zurlo, E. Avanzinelli, B. Bassano, N. Miraglia. ((Intervento presentato al 66. convegno Annual Meeting of the European Federation of Animal Science tenutosi a Warszawa nel 2015.

Preliminary study on Alpine ibex (Capra ibex ibex, L.) and livestock distribution in Gran Paradiso National Park

M. Zurlo
Primo
;
2015-09-03

Abstract

In the last decades there was a drastic decrease in Gran Paradiso National Park ibex population linked with a reduction of stable occupied territories. Causes are still not completely clear but drastic decline is in partly related to recent climate changes. The objectives of this work are: (1) understand ibex distribution in GPNP in 1985-2009 period and describe livestock distribution in the same area in 2000-2009; (2) assess relation between distribution pattern and ibex population trend in 2000-2009. To understand distribution patterns 5 landscape ecology metrics are been selected to assess the composition and spatial configuration of occupied areas. Spearman’s rank correlation coefficient was used to test composition and configuration metric trends and their relation with ibex population size. Results showed a reduction of ibex occupied territories from 4,587.50 hectares in 1985 to 2,331.25 ha in 2009 (r =-0,818; P<0,001). Number of patches increased from 130 to 224 units (r s s =0,784; P<0,001). Livestock distribution didn’t show a particular trend (r s 2 S), ammonia (NH 3 ), carbon monoxide (CO), and carbon dioxide (CO 4 types of floating covers were tested: light expanded clay aggregate (leca), peat, sunflower oil, sawdust, straw, and plastic film. The manure was stored at 5, 15, and 25 °C for 37 d. Gaseous emissions were measured from headspaces of dynamic chambers. The results of our study showed that both the covering and temperature have a noticeable impact on gas emission from pig liquid manure. The plastic film cover was the most efficient at all temperatures tested, because it reduced the emissions of all measured gases. In this instance, average emission reductions were: CH 4 91.5% (P<0.01), NO 92.0% (P<0.05), H 2 ≈0 or P>0,05). The relation between changes in ibex population trend and distribution patterns was not proven (all P>0,005). These results suggest that probably ibex distribution was influenced by different combined factors (landscape changes, climate change, anthropic activities) and they show how landscape ecology approach may become an useful tool to understand the degree of fragmentation and connectivity of landscape defined on species distribution. In conclusion, the understanding of processes behind Alpine ungulates distribution have to consider the influence of landscape patterns on environmental processes to improve the conservation efforts at management level.
Capra ibex; livestock; spatial pattern; species distribution
Settore BIO/07 - Ecologia
http://www.eaap.org/wp-content/uploads/2015/08/EAAP2015BA.pdf
Preliminary study on Alpine ibex (Capra ibex ibex, L.) and livestock distribution in Gran Paradiso National Park / M. Zurlo, E. Avanzinelli, B. Bassano, N. Miraglia. ((Intervento presentato al 66. convegno Annual Meeting of the European Federation of Animal Science tenutosi a Warszawa nel 2015.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/489613
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