The Conservation Land Trust Argentina

Mercedes, Argentina

The Conservation Land Trust Argentina

Mercedes, Argentina
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Calcaterra L.A.,CONICET | Di Blanco Y.,National University of Misiones | Srur M.,The Conservation Land Trust Argentina | Briano J.,CONICET
Journal of Insect Conservation | Year: 2014

Fire is an important component of many natural ecosystems affecting plant communities and arthropods by mortality during combustion and/or indirectly through the modification of the habitat. The Iberá Natural Reserve (INR) is one of the most diverse ecosystems in northern Argentina; it is dominated by grasslands commonly affected by disturbances, such as grazing and fire. The objective of this work was to study the response of ground-foraging ant assemblages, particular species, and functional groups to an extended fire of high intensity in four natural INR habitats with >5 years of cattle exclusion (strict conservation area). A total of 12,798 ant workers of 67 species were captured in 39 sampling stations. The ant fauna was less abundant in burned sites only a few days after the fire; 6 months later, no effect was detected. Richness and abundance of ants differed among unburned habitats. However, fire effect on species richness and composition remained unclear. The rapid recovery of the ant fauna made these insects poor indicators of long-term fire-promoted changes on biodiversity in open habitats dominated by grassland, though some ant species showed a high level of habitat fidelity mainly in unburned habitats. These results agree with those from other areas of the world, indicating that ants are particularly unreliable biodiversity indicators, with the exception of severe disturbance with long-term habitat restoration. Management decisions at the INR should be oriented to preserve the closed savanna, one of the most diverse and threatened habitat of Argentina. © 2014 Springer International Publishing Switzerland.

Ballari S.A.,CONICET | Cuevas M.F.,CONICET | Cirignoli S.,The Conservation Land Trust Argentina | Valenzuela A.E.J.,Southern Patagonia Coordination Office | Valenzuela A.E.J.,National University of Tierra del Fuego
Biological Invasions | Year: 2015

The wild boar is an invasive ecosystem engineer in Argentina that has lacked sufficient basic information to determine applied actions. The current distribution, impacts and management of this species were analyzed using the expert opinion surveys of protected area managers. The boar is widely distributed and occupies most of Argentina’s terrestrial ecoregions. Moreover, its populations are common, and its abundance is growing in most of the protected areas. Boars were recorded mostly in wetlands, forest and shrublands. Managers also reported a wide range of negative impacts, which included soil disturbance, vegetation damage and animal predation. Several control method types are used and in most protected areas, more than one are applied, but hunting was the most used technique. However, the effectiveness of control methods was low, suggesting the need of an urgent plan to define coordinated management actions to minimize the negative impacts of this species and also to prevent its expansion into new areas. © 2014, Springer International Publishing Switzerland.

Debarbora V.N.,CONICET | Nava S.,Instituto Nacional de Tecnologia Agropecuaria | Cirignoli S.,The Conservation Land Trust Argentina | Guglielmone A.A.,Instituto Nacional de Tecnologia Agropecuaria | Poi A.S.G.,CONICET
Systematic and Applied Acarology | Year: 2012

Five species of ticks belonging to the genera Amblyomma, Haemaphysalis and Rhipicephalus were recorded from endemic and exotic wild mammals in the Esteros del Iberá wetlands, Argentina. Adults and immature stages of Amblyomma dubitatum were found on Hydrochoerus hydrochaeris, Sus scrofa, Axis axis and Myrmecophaga tridactyla. Larvae and nymphs of A. dubitatum were collected on Bubalus bubalis, Lepus europaeus, Monodelphis dimidiata and on the rodents Cavia aperea, Scapteromys aquaticus, Oligoryzomys flavescens and Akodon azarae. One male of Amblyomma nodosum was associated with M. tridactyla; specimens of Haemaphysalis juxtakochi were found on A. axis, S. scrofa and Mazama gouazoubira; and Rhipicephalus (Boophilus) microplus was detected on Blastocerus dichotomus. Adults of Amblyomma triste were collected on B. dichotomus, S. scrofa and H. hydrochaeris, while immatures of this tick were recorded on M. dimidiata, A. azarae, S. aquaticus, O. flavescens and H. hydrochaeris. In addition to elucidating tick-host associations, the findings of this survey are biomedically important. Although the tick fauna of Esteros del Iberá is limited, some species, such as A. triste and R. (B.) microplus, are recognized vectors of pathogenic agents infecting humans and animals. Also, a large number of the Esteros del Iberá collection records were for ticks from exotic (S. scrofa, A. axis, B. bubalis, L. europaeus) or reintroduced (M. tridactyla) mammals, suggesting that the introduction of these mammals may result in the amplification of tick populations in the study area, with potential deleterious effects on the endemic fauna. © 2012 Systematic & Applied Acarology Society.

Caruso F.,Northeast National University | Perez I.J.,The Conservation Land Trust Argentina
Endangered Species Research | Year: 2013

Few studies have assessed public attitudes in relation to the reintroduction of large felids. We evaluated the knowledge and attitudes of inhabitants of Corrientes province, Ar gen - tina, in relation to the proposed reintroduction of jaguars Panthera onca to Iberá Natural Reserve(INR). Corrientes is a traditional society in which cattle ranching shapes much of the geographical landscape and social character. A questionnaire was distributed to a random sample of residentsfrom the provincial capital, 2 towns neighboring INR, and 3 villages inside or adjacent to the reserve. In general, residents showed a much greater positive disposition towards jaguars than actual knowledge about the species. We found a 95% level of support for the return of jaguars, which was independent of the respondents' gender, age, or location. A small random sample of cattle ranchers also showed significant support for the project. These results were obtained prior to any educational campaigns promoting the reintroduction of jaguars, which suggests that jaguars were already considered a positive symbol in the province. We propose that the jaguar may be acting as a bridge between a proud traditional heritage and an alternative future where ecotourism serves as a route towards economic development. Conservation managers should be aware that this widespread support will probably change once jaguars become present in the local ecosystem and economy. © Inter-Research 2013.

Cirignoli S.,The Conservation Land Trust Argentina | Galliari C.A.,CONICET | Pardinas U.F.J.,CONICET | Podesta D.H.,National University of Costa Rica | Abramson R.,Parque Provincial Salto Encantado
Mastozoologia Neotropical | Year: 2011

Mammals of the Valle del Cuña Pirú Reserve, Misiones, Argentina. Here we present the results of surveys conducted at the Reserva Privada de Usos Múltiples Valle del Cuña Pirú (Misiones, Argentina) with the objective to assess the diversity of mammals in this area. The study area is placed at the middle part of the course of arroyo Cuña Pirú, near Aristóbulo del Valle, where phytogeographical communities of Selvas Mixtas and Campos districts intermix, both belonging to the Upper Paraná Atlantic Forest. Nine field works allowed us to register 58 native and three exotic species, included in 24 families and 10 orders. The richnest recorded families were Cricetidae (11 species) and Didelphidae (7 species); the bats were under-represented due to methodological samping bias. Typical species of open environments from southern Misiones and northern Corrientes, such as Cavia aperea, Lutreolina crassicaudata, and Necromys lasiurus, were recorded only in cultivated fields and fragmented patches of natural grasslands. We propose that Myrmecophaga tridactyla and Pteronura brasiliensis should be considered as extirpated from this area. The mammals constitute an important food resource for local aboriginal groups that inhabit the reserve (Mbyá communities), but they are also under severe hunting pressure by most of local dwellers. Hunting activities added to habitat fragmentation could increase extinctions at local scale, specifically for some of the larger mammals (e. g., Tapirus terrestris, Panthera onca). © SAREM, 2011.

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