Results 91 to 100 of about 17,840 (262)

Invasion of winter moth in New England: Effects of defoliation and site quality on tree mortality. [PDF]

, 2014
Widespread and prolonged defoliation by the European winter moth, Operophtera brumata L., has occurred in forests of eastern Massachusetts for more than a decade and populations of winter moth continue to invade new areas of New England.
Dodds, Kevin J, Ducey, Mark J., Lee, Thomas D, Simmons, Michael J   +3 more
core   +3 more sources

Low‐nitrogen addition amplifies the positive effect of grazing exclusion on plant diversity and community stability

Functional Ecology, EarlyView.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Grazing exclusion is widely used for grassland restoration but often improves productivity slowly, whereas nitrogen (N) addition can rapidly boost productivity yet may erode plant diversity and community stability over the long term.
Chunping Zhang, Kang Yang, Zhifa Zang, Mengmeng Lu, Sihan Chen, Yuansheng Huang, Jiaxin Li   +6 more
wiley   +1 more source

Efecto de la defoliación post-quema sobre el crecimiento de dos gramíneas nativas en el Caldenal, Argentina [PDF]

, 2009
El crecimiento en los pastizales naturales semiáridos puede ser afectado por la longitud de tiempo que el pastoreo es excluido durante el período de regeneración post-fuego.
Boo, Roberto Miguel, Elia, Omar Raul, Martinez, S. A., Mayor, M. D., Pelaez, Daniel Valerio   +4 more
core  

Generation cycles in experimental populations of a multivoltine insect

Journal of Animal Ecology, EarlyView.
Although theory suggests various mechanisms by which environmental and ecological factors may drive generational fluctuations, our field‐cage experiment is the first to demonstrate how internal dynamics and external disturbances jointly produce synchronised, large‐scale outbreak cycles.
Takehiko Yamanaka, Yasushi Sato, William A. Nelson, Ottar N. Bjørnstad   +3 more
wiley   +1 more source

Impacts of air pollution on human and ecosystem health, and implications for the National Emission Ceilings Directive. Insights from Italy [PDF]

, 2019
Across the 28 EU member states there were nearly half a million premature deaths in 2015 as a result of exposure to PM2.5, O3 and NO2. To set the target for air quality levels and avoid negative impacts for human and ecosystems health, the National ...
Anav, Alessandro, Ciancarella, Luisella, D'Elia, Ilaria, De Marco, Alessandra, Fares, Silvano, Fornasier, Maria Francesca, Fusaro, Lina, Gualtieri, Maurizio, Leonardi, Cristina, Manes, Fausto, Marchetto, Aldo, Mircea, Mihaela, Paoletti, Elena, Piersanti, Antonio, Proietti, Chiara, Rogora, Michela, Salvati, Luca, Salvatori, Elisabetta, Screpanti, Augusto, Vialetto, Giovanni, Vitale, Marcello   +20 more
core   +1 more source

The Coloniality of Data: Police Databases and the Rationalization of Surveillance from Colonial Vietnam to the Modern Carceral State

The British Journal of Sociology, EarlyView.
ABSTRACT Tracing the early adoption of computer gang databases by the Los Angeles County Sheriff's Department and the Los Angeles Police Department in the 1980s to the deployment of computationally‐assisted surveillance during the Vietnam War, this paper uses a genealogical approach to compare surveillance technologies developed across the arc of ...
Christina Hughes
wiley   +1 more source

Some aspects of grazing ecosystems : a thesis presented in partial fulfilment of the requirements for the degree of Master of Agricultural Science at Massey University [PDF]

, 1970
The conversion of plant material to meat and milk by ruminants is one of the main ways in which the demand for energy and more especially protein for human consumption is met.
Scoffield, John Ernest
core  

Silicon, endophytes and secondary metabolites as grass defenses against mammalian herbivores [PDF]

, 2014
Article Accepted Date: 30 August 2014 Acknowledgments This study was supported by the Academy of Finland (grant no. 133495 to Otso Huitu; grants no. 137909 and 110658 to Kari Saikkonen) and by the NERC (grant no. NE/F003994/1 to Xavier Lambin).
Forbes, Kristian M, Hartley, Sue, Helander, Marjo, Huitu, Otso, Julkunen-Tiitto, Riitta, Lambin, Xavier, Saikkonen, Kari, Stuart, Peter, Sulkama, Sini   +8 more
core   +2 more sources

The predatory behavior of ants: an impressive panoply of morphological adaptations

Insect Science, EarlyView.
This review focuses on predation in ants, showing the wide diversity of cases from solitary foraging to group hunting tactics, as well as the evolution of mandible shape frequently adapted to capture specific prey. Although most ants are generalist feeders, finding their sugary substances directly on plants or indirectly via sap‐sucking insects, some ...
Alain Dejean, Xim Cerdá, Jérôme Orivel, Frédéric Azémar, Alexander L. Wild, Bruno Corbara, Axel Touchard   +6 more
wiley   +1 more source

Effect of altitude and defoliation frequency in the quality and growth of Kikuyu grass (Cenchrus clandestinus)

Revista Facultad Nacional de Agronomía Medellín, 2020
This study aimed at determining the nutritional efficiency of Kikuyu grass, when it is cultivated at different altitudes and defoliated with a different number of leaves per tiller. Four farms, with Kikuyu crops (Cenchrus clandestinus), were selected, two in an average altitude of 2,552 m.a.s.l. and two in average altitude of 2,914 m.a.s.l.
Miguel Alejandro Escobar Charry, Edgar Alberto Cardenas Rocha, Juan Evangelista Carulla Fornaguera   +2 more
openaire   +4 more sources