Publications by authors named "Karina L Speziale"

Article Synopsis
  • Climate change is causing plant species in mountains worldwide to shift their elevational ranges, complicating efforts to monitor these changes due to varying sampling methods.
  • The Mountain Invasion Research Network (MIREN) developed a standardized protocol to assess native and non-native plant distributions along elevation gradients over time, using surveys conducted every five years at specific sites.
  • Initial results show unique elevational patterns for native plant richness and a global decline in non-native species, highlighting disturbed areas like road edges as hotspots for plant invasions, emphasizing the need for more global studies to guide conservation efforts.
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Land use change alters wildlife critical animal behaviours such as movement, becoming the main driver threatening wildlife ecological functions (WEF) and nature's contribution to people (NCP) provided by terrestrial species. Despite the negative impacts of current rates of terrestrial fragmentation on WEF, many ecological processes can be still occurring through aerial habitats. Here, we propose and discuss that the movement capabilities of aerial species, as well their functional redundancy with non-flying wildlife, are the mechanisms by which some ecological processes can be still occurring.

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Rubbish dumps can become an important environmental source of plastic. Several species feed on organic waste from these sites, but at the same time are exposed to non-organic materials. Species that can gather food in these sites might at the same time disperse waste consumed, but this has rarely been evaluated.

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Soil nitrogen (N) availability is critical for grassland functioning. However, human activities have increased the supply of biologically limiting nutrients, and changed the density and identity of mammalian herbivores. These anthropogenic changes may alter net soil N mineralization (soil net N ), that is, the net balance between N mineralization and immobilization, which could severely impact grassland structure and functioning.

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Background: Global change produces pervasive negative impacts on biodiversity worldwide. Land use change and biological invasions are two of the major drivers of global change that often coexist; however, the effects of their interaction on natural habitats have been little investigated. In particular, we aimed to analyse whether the invasion of an introduced grass (; cheatgrass) along roads verges and the disturbance level in the natural surrounding habitat interact to influence the degree of invasion in the latter habitats in north-western Patagonia.

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The exponential growth of the human population often causes the overexploitation of resources and disruption of ecological interactions. Here, we propose that the antagonist effect of humans on exploited species might be alleviated with the advent of a second predator species. We focused on the complex interactions between an endangered conifer () and two seed exploiters: the Austral parakeet () and human seed collectors.

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Despite the fact that parrots (Psitacifformes) are generalist apex frugivores, they have largely been considered plant antagonists and thus neglected as seed dispersers of their food plants. Internal dispersal was investigated by searching for seeds in faeces opportunistically collected at communal roosts, foraging sites and nests of eleven parrot species in different habitats and biomes in the Neotropics. Multiple intact seeds of seven plant species of five families were found in a variable proportion of faeces from four parrot species.

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Fraser et al. (Reports, 17 July 2015, p. 302) report a unimodal relationship between productivity and species richness at regional and global scales, which they contrast with the results of Adler et al.

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Reintroduction or reinforcement (RorR) of wild populations is a common conservation strategy. Many conservation projects involve the release of individuals of poorly studied species. This may lead to inefficient results or negative impacts on the conservation efforts.

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