Results 71 to 80 of about 80,664 (261)

OBTENCION OF ESSENTIAL OILS AND PECTINS FROM BY-PRODUCTS OF CITRUS JUICE

open access: yesVitae, 2009
Essential oils and pectins are obtained from the mandarin, orange, grapefruit and pommelo by-products. The essential oils are isolated by microwave-assisted hydrodistillation.
Jennifer P. ROJAS Ll.   +2 more
doaj  

Patrones de diversidad de epífitos en la Reserva Ecológica Arenillas, Ecuador: Un punto caliente de diversidad de líquenes

open access: yesManglar
Los bosques secos están caracterizados por poseer una alta diversidad y una extraordinaria cantidad de especies endémicas de diferentes grupos taxonómicos donde se incluyen los líquenes, sin embargo, la fragmentación, ganadería, agricultura y extracción ...
Ángel Benítez   +4 more
doaj   +1 more source

The family "Thelypteridaceae" in Europe [PDF]

open access: yes, 1983
Thelypteridaceae are mainly tropical ferns, the total number of species is about one thousand. The five European species represent five different groups, each of which has recently been accorded generic status.
Holtumm, R.E.
core   +2 more sources

Differences in characteristics between naturalized threatened plants and other threatened plants

open access: yesConservation Biology, EarlyView.
Abstract Many non‐native plant species introduced by humans have become naturalized. At the same time many species are threatened in their native range. However, the number of plant species threatened in their native range that are naturalized elsewhere remains unknown.
Weihan Zhao   +10 more
wiley   +1 more source

Biodiversidad de Neuroptera en México

open access: yesRevista Mexicana de Biodiversidad, 2013
Los neurópteros se caracterizan por poseer amplias alas membranosas reforzadas por una elaborada venación reticulada. Son predadores, principalmente en estado larvario, por lo que se consideran un grupo benéfico controlador de algunas plagas de ...
Atilano Contreras-Ramos   +1 more
doaj  

Aporte del área de influencia del páramo de Belmira (Santa Inés) a la diversidad regional de Pronophilina (Lepidoptera: Satyrinae) del norte de los Andes

open access: yesRevista Mexicana de Biodiversidad, 2017
La diversidad biológica no está uniformemente distribuida en la tierra, existiendo sitios más relevantes en virtud de sus propiedades intrínsecas o de sus contextos evolutivos y/o biogeográficos. Los Andes tropicales son reconocidos a nivel global por su
Carlos Federico Alvarez-Hincapié   +5 more
doaj   +1 more source

Polinizadores y polinización en frutales subtropicales : implicaciones en manejo, conservación y seguridad alimentaria [PDF]

open access: yes, 2018
The commercialization and consumption of tropical fruits has grown worldwide during the last decade. This trend is expected to continue, due to the increasing world population and the greater demand for these products in western markets. As in most fruit
Alcaraz, Librada   +5 more
core   +2 more sources

Functional homogenization of terrestrial mammals outside protected areas in the Hengduan Mountains, China

open access: yesConservation Biology, EarlyView.
Abstract Despite the crucial role of human impacts on biodiversity loss, many assessments of this loss focus on single metrics, such as species richness, and overlook the multidimensional effects of human activities. Because of its importance to ecosystem functioning, we investigated the functional diversity of medium‐ and large‐sized mammal ...
Xueyou Li   +8 more
wiley   +1 more source

Geographic risks to functional groups of mammals and birds from habitat loss in Mexico

open access: yesConservation Biology, EarlyView.
Abstract There is a need to quantify the impact of habitat loss due to anthropogenic factors on different aspects of biodiversity, such as functional trait diversity represented by functional groups (FGs). We developed a metric to assess the weighted risk of loss of habitat for 33 FGs of mammals and 36 FGs of birds in Mexico based on potential ...
Fernando Mayani‐Parás   +4 more
wiley   +1 more source

Recursos genéticos de gramíneas para el pastoreo extensivo. Condición actual y urgencia de su conservación ante el cambio climático

open access: yesAIA Avances en Investigación Agropecuaria, 2017
México es un país con amplia dependencia de diversidad genética intraespecífica para especies forrajeras tropicales (Poaceae), las cuales son altamente productivas para forraje y productos pecuarios en pastoreo.
Adrián Raymundo Quero Carrillo   +2 more
doaj  

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