scholarly journals Does the protected area network preserve bird species of conservation concern in a rapidly changing climate?

2012 ◽  
Vol 22 (2) ◽  
pp. 459-482 ◽  
Author(s):  
Raimo Virkkala ◽  
Risto K. Heikkinen ◽  
Stefan Fronzek ◽  
Heini Kujala ◽  
Niko Leikola
Author(s):  
Saija Kuusela ◽  
Kaisu Aapala ◽  
Juha Aalto ◽  
Risto Heikkinen ◽  
Niko Leikola ◽  
...  

Oryx ◽  
2011 ◽  
Vol 45 (2) ◽  
pp. 191-200 ◽  
Author(s):  
Héctor M. Hernández ◽  
Carlos Gómez-Hinostrosa

AbstractWe used distribution data of 121 cactus species endemic to the Chihuahuan Desert to test the effectiveness of the region’s protected area network. The analysis of species distribution using a 30′ latitude × 30′ longitude grid facilitated the identification and categorization of areas of endemism. We found a low degree of coincidence between protected areas and the areas of cactus endemism, and only 63.6% of the 121 species occur in protected areas. A complementarity analysis showed that 10 of the protected areas contain the 77 species that occur in protected areas. The four top priority areas protect 65 (84.4%) of these 77 species The 44 unprotected species are mainly micro-endemic and taxonomically distinctive taxa widely scattered in the region. The complementarity analysis applied to these species showed that all of them can be contained in a minimum of 24 grid squares, representing 32.9% of the total area occupied. Their strong spatial dispersion, along with their narrow endemism, is a major conservation challenge. We conclude that the current protected area network is insufficient to protect the rich assemblage of cacti endemic to the Chihuahuan Desert. Conservation efforts in this region should be enhanced by increasing the effectiveness of the already existing protected areas and by the creation of additional protected areas, specifically micro-reserves, to provide refuge for the unprotected species.


2014 ◽  
Vol 176 ◽  
pp. 144-152 ◽  
Author(s):  
William S. Beatty ◽  
Dylan C. Kesler ◽  
Elisabeth B. Webb ◽  
Andrew H. Raedeke ◽  
Luke W. Naylor ◽  
...  

2016 ◽  
Author(s):  
Marie-Andrée Giroux ◽  
Myriam Trottier-Paquet ◽  
Joël Bêty ◽  
Vincent Lamarre ◽  
Nicolas Lecomte

Predation is one of the main factors explaining nesting mortality in most bird species. Birds can avoid nest predation or reduce predation pressure by breeding at higher latitude, showing anti-predator behaviour, and nesting in association with protective species. Plovers actively defend their territory by displaying early warning and aggressive/mobbing behaviour, potentially benefiting the neighbouring nests by decreasing their predation risk. To test for the existence of such a protective effect, we studied the influence of proximity to plover nests on predation risk of artificial nests on Igloolik Island (Nunavut, Canada) in July 2014. We predicted that the predation risk of artificial nests increases and decreases with the distance to and the density of plover nests, respectively. We monitored 18 plover nests and set 35 artificial nests at 30, 50, 100, 200 and 500 m from seven of those plover nests. Surprisingly, we showed that predation risk of artificial nests increases with the density of active plover nests. We also found a significant negative effect of the distance to the nearest active protector nest on predation risk of artificial nests. Understanding how the composition and structure of shorebird communities generate spatial patterns in predation risks represent a key step to better understand the importance of these species of conservation concern in tundra food webs.


2020 ◽  
Vol 57 (10) ◽  
pp. 1969-1980
Author(s):  
Gerardo Martín ◽  
Mario Espinoza ◽  
Michelle Heupel ◽  
Colin A. Simpfendorfer

2017 ◽  
Vol 10 ◽  
pp. 194008291773809
Author(s):  
Liliana Ortiz-Lozada ◽  
Jaime Pelayo-Martínez ◽  
Claudio Mota-Vargas ◽  
Ana Paulina Demeneghi-Calatayud ◽  
Vinicio J. Sosa

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