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Assessing understory development in forest plantations using laser imaging detection and ranging (LiDAR) RChHN
HERNÁNDEZ,JAIME; ACUÑA,M. PAZ; CORVALÁN,PATRICIO; SIMONETTI,JAVIER A.
Forestry plantations are expected to be managed in ways to conserve biodiversity while producing goods and services. This goal implies a significant challenge as plantations tend to reduce species richness. The presence of well developed understory enhances the value of plantations as habitat for native fauna. Here, we develop a straightforward method to assess the availability of understory in forestry stands using laser imaging detection and ranging (LiDAR) data and aerial RGB high resolution images. Based on field and airborne acquired data for Pinus radiata stands in central Chile, the digital crown model (DCM), derived from the subtraction of the digital terrain model (DTM) from the digital surface model (DSM) is a more reliable predictor of...
Tipo: Journal article Palavras-chave: Forestry plantations; Kriging; LiDAR; Pinus radiata; Understory height.
Ano: 2013 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2013000400005
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Conservation biology in Chile: Are we fulfilling our social contract? RChHN
SIMONETTI,JAVIER A.
Biodiversity conservation needs to be informed by science. On this regard, scientific efforts ought to be allocated to tackle research priorities; offer sound and explicit advice, and results ought to be translated into conservation plans and programs. If such conditions are met, scientists would be fulfilling their social contract, sensu Lubchenco. In this brief essay I analyze the fulfillment of such a contract in Chile. In general, the scarce priorities set for addressing conservation issues are not considered, only a third of scientific publications in conservation-related issues offer explicit advice and a minor fraction of relevant scientific information is considered in the preparation of conservation plans. Current mismatch between conservation...
Tipo: Journal article Palavras-chave: Conservation practice; Conservation research.
Ano: 2011 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2011000200002
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Denied density-dependent seedling recruitment in a fragmented forest does not decrease seedling diversity RChHN
VALDIVIA,CARLOS E; SIMONETTI,JAVIER A.
Negative density-dependent relationships in plant communities are currently claimed as an important mechanism for the maintenance of plant diversity. However, anthropogenic perturbations such as forest fragmentation might modify such relationships. We evaluated density-dependent relationships between seed and seedling abundance of a tree assemblage in a fragmented forest for estimating seed-to-seedling transitions and their effects on seedling richness. In continuous forest, two out of four and one out of four species presented significant or a tendency to exhibit negative seedling recruitment which is in agreement with other temperate and tropical forests. In forest fragments (1-6 ha), however, this relationship was uncoupled. Seedling richness and...
Tipo: Journal article Palavras-chave: Density-dependent recruitment; Diversity; Forest fragmentation; Seedlings; Seeds.
Ano: 2011 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2011000200012
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Forested habitat preferences by Chilean citizens: Implications for biodiversity conservation in Pinus radiata plantations RChHN
PÜSCHEL-HOENEISEN,NICOLE; SIMONETTI,JAVIER A.
The need for conservation outside protected areas has prompted the modification of productive practices to allow the maintenance of wild biota in productive landscapes such as those associated to timber production. Forest plantations could cooperate in conserving biodiversity outside protected areas if they have a developed understory. However, the success of the production changes depends on the social support they receive. Therefore, we evaluate Chilean citizens' preference for five habitats of different types of forest management. In addition, we assessed perceptions regarding the relationship between pine plantations and native wildlife through surveys administered in Chillán, Santiago and six rural localities in the VII and VIII region. Despite there...
Tipo: Journal article Palavras-chave: Chile; Habitat evaluation; Pine plantations; Understory.
Ano: 2012 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2012000200002
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Holocene distribution of Octodontid rodents in central Chile RChHN
SAAVEDRA,BÁRBARA; SIMONETTI,JAVIER A.
We describe the Holocene distribution of the Octodontids Aconaemys fuscus, Octodon bridgesi, O. degus, O. lunatus, O. pacificus and Spalacopus cyanus from Central Chile. We compared ancient and present day ranges. The Holocene pattern was inferred from zooarchaeological records. Octodon degus, O. lunatus, O. bridgesi, and Aconaemys fuscus showed a reduction in their geographic range. Although specific mechanisms remain to be tested, human disturbance seems to be the distal factor that explains the reduction of ranges for some taxa.
Tipo: Journal article Palavras-chave: Octodontidae; Holocene; Central Chile; Zooarchaeology.
Ano: 2003 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2003000300004
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Using fecal profiles of bile acids to assess habitat use by threatened carnivores in the Maulino forest of central Chile RChHN
GUERRERO,CARLA; ESPINOZA,LUIS; NIEMEYER,HERMANN M; SIMONETTI,JAVIER A.
The distribution and habitat use by carnivores can be assessed by studying their tracks or feces. If these methods are to be used confidently, they should not only unequivocally discriminate among species, but should also render the same patterns of spatial distributions. We assessed the fulfillment of these requirements with five carnivores inhabiting the Maulino forest of central Chile: Galictis cuja, Oncifelis guigna, Pseudalopex culpaeus, Pseudalopex griseus, and Puma concolor. Fecal bile acid thin layer chromatographic profiles were assessed, and shown to be species-specific, invariant within samples of a given individual and among individuals of a given species, but consistently different across species. The spatial distribution of feces in mixed...
Tipo: Journal article Palavras-chave: Fecal bile acids; Galictis; Habitat use; Oncifelis; Pseudalopex; Puma; Thin layer chromatography.
Ano: 2006 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2006000100008
Registros recuperados: 6
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