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The dynamics of change in soil use, period 1994-2007, for a watershed in the region of La Araucania, Chile, was analyzed. The study area shows changes in soil use, intense land division and degradation of natural systems. The methodology included (1) cartographic analysis, confusion matrix and ka...


Sepulveda Varas, AlejandraSaavedra Briones, PabloEsse, Carlos[Analysis of change of coverage and land use in a Chilean pre-Andean sub-basin. Tool for the productive sustainability of a territory]Analysis of change of coverage and land use in a Chilean pre-Andean sub-basin. Tool for the productive sustainability of a territory

Today, there is growing interest in the automatic classification of a variety of tasks, such as weather forecasting, product recommendations, intrusion detection, and people recognition. Mixture-of-experts is a well-known classification technique; it is a probabilistic model consisting of local e...


Peralta Márquez, BillySaavedra, ArielCaro Saldivia, LuisSoto, Alvaro[Mixture of Experts with Entropic Regularization for Data Classification]Mixture of Experts with Entropic Regularization for Data Classification

The monotypic genus Leontochir Phil. (Alstroemeriaceae Dumortier), represented by Leontochir ovallei, is endemic to Chile, and its geographical distribution is restricted to the coastal zone of the Atacama Desert (28 degrees S). In previous cytogenetic studies on L. ovallei a diploid karyotype 2n...


Jara Seguel, PPalma Rojas, CVon Brand, E[C-banding pattern in the geophytic Leontochir ovallei (Alstroemeriaceae)]C-banding pattern in the geophytic Leontochir ovallei (Alstroemeriaceae)
Dumorne, KellyValdebenito Isler, IvánContreras, PabloUlloa Rodriguez, PatricioRisopatron, JennieFigueroa Villalobos, ElíasEstevez, Manuel LeeDiaz, RommyFarias, Jorge[Effect of pH, osmolality and temperature on sperm motility of pink cusk-eel (Genypterus blacodes, (Forster, 1801))]Effect of pH, osmolality and temperature on sperm motility of pink cusk-eel (Genypterus blacodes, (Forster, 1801))

Polar systems are experiencing rapid climate change and the high sensitivity of these Arctic and Antarctic ecosystems make them especially vulnerable to accelerated ecological transformation. In Antarctica, warming results in a mosaic of ice-free terrestrial habitats dominated by a diverse assemb...


Prather, Hannah M.Casanova Katny, AngelicaClements, Andrew F.Chmielewski, Matthew W.Balkan, Mehmet A.Shortlidge, Erin E.Rosenstiel, Todd N.Eppley, Sarah M.[Species-specific effects of passive warming in an Antarctic moss system]Species-specific effects of passive warming in an Antarctic moss system

The coastal area of the Araucania Region stands out for the presence of wooded wetlands of Temu and Pitra (Blepharocalyo-Myrceugenietum exsuccae), from the association Blepharocalyo-Myrceugenietum exsuccae. These are nowadays affected by antropic activities. We evaluated the vascular flora, the d...


Hauenstein Barra, EnriquePena Cortes, FernandoBertran, CarlosTapia, JaimeVargas Chacoff, LuisUrrutia, Odette[Floristic composition and evaluation of the degradation of the swampy coastal forest of temu-pitra in the Araucania Region, Chile]Floristic composition and evaluation of the degradation of the swampy coastal forest of temu-pitra in the Araucania Region, Chile

Manganese (Mn) toxicity limits plant growth in acid soils. Although Mn toxicity induces oxidative stress, the role of superoxide dismutase (SOD, EC.1.15.1.1) isoforms in conferring Mn tolerance remains unclear. Seedlings of ryegrass cultivars Nui (Mn-sensitive) and Kingston (Mn-tolerant) were hyd...


Ribera Fonseca, AlejandraInostroza Blancheteau, ClaudioCartes, PaulaRengel, ZedMora, M. L.[Early induction of Fe-SOD gene expression is involved in tolerance to Mn toxicity in perennial ryegrass]Early induction of Fe-SOD gene expression is involved in tolerance to Mn toxicity in perennial ryegrass

In cereals cultivated in Southern Chilean Andosols, arbuscular mycorrhizal (AM) fungi may play a main role for phosphorus (P) uptake. Because P acquisition at early growth stages is crucial for cereals, we investigated the development of indigenous AM during the first 45 days after planting of tw...


Castillo Rubio, ClaudiaPuccio, F.Morales Ulloa, DanizaBorie, F.Sieverding, E.[Early arbuscular mycorrhiza colonization of wheat, barley and oats in Andosols of southern Chile]Early arbuscular mycorrhiza colonization of wheat, barley and oats in Andosols of southern Chile

Rodents have a high impact on human activities, producing economical losses and diseases. One of these diseases is Hantavirus syndrome, whose reservoir is Oligoryzomys longicaudatus. Raptors are the natural biological controllers of rodents, being, therefore, our efficient and effective allies. D...


Munoz Pedreros, AndresGil, ClaudiaYanez, JoseRau, Jaime R.[Raptor habitat management and its implication on the biological control of the Hantavirus]Raptor habitat management and its implication on the biological control of the Hantavirus

The family Sphaeriidae is a group of cosmopolitan freshwater clams that inhabit temporary and permanent fluvial and lacustrine environments around the world. In Chile, Sphaeriidae is represented by 11 species belonging to the genera Musculium, Pisidium and Sphaerium. In this study, the nuclear DN...


Jara Seguel, PedroParada Zamorano, EsperanzaPeredo, SantiagoPalma Rojas, Claudiovon Brand, Elisabeth[Nuclear DNA content in two Sphaeriidae species from Southern Chile (Bivalvia: Veneroida)]Nuclear DNA content in two Sphaeriidae species from Southern Chile (Bivalvia: Veneroida)

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