Results 11 to 20 of about 1,223,609 (376)

Positive but variable effects of crop diversification on biodiversity and ecosystem services

open access: yesGlobal Change Biology, 2021
Ecological theory suggests that biodiversity has a positive and stabilizing effect on the delivery of ecosystem services. Yet, the impacts of increasing the diversity of cultivated crop species or varieties in agroecosystems are still under scrutiny. The
D. Beillouin   +4 more
semanticscholar   +1 more source

Key innovations and the diversification of Hymenoptera

open access: yesNature Communications, 2023
Hymenoptera is an incredibly diverse order, with numerous behavioral and morphological innovations. Here, the authors compile a time-calibrated Hymenoptera phylogeny and find that secondary transitions to phytophagy, plant feeding, are associated with ...
Bonnie B. Blaimer   +10 more
semanticscholar   +1 more source

Agricultural diversification promotes multiple ecosystem services without compromising yield

open access: yesScience Advances, 2020
Diversification practices benefit biodiversity, pollination, pest control, nutrient cycling, soil fertility, and water regulation. Enhancing biodiversity in cropping systems is suggested to promote ecosystem services, thereby reducing dependency on ...
Giovanni Tamburini   +6 more
semanticscholar   +1 more source

Does Energy Diversification Cause an Economic Slowdown? Evidence from a Newly Constructed Energy Diversification Index

open access: yesSocial Science Research Network, 2022
Countries have made considerable efforts to diversify their energy sources from fossil fuels to renewables in the last two decades to achieve sustainable economic development.
Giray Gozgor, S. Paramati
semanticscholar   +1 more source

Extant timetrees are consistent with a myriad of diversification histories

open access: yesNature, 2020
Time-calibrated phylogenies of extant species (referred to here as ‘extant timetrees’) are widely used for estimating diversification dynamics1. However, there has been considerable debate surrounding the reliability of these inferences2–5 and, to date ...
Stilianos Louca, Matthew W. Pennell
semanticscholar   +1 more source

Does Diversification Cause the 'Diversification Discount'? [PDF]

open access: yesSSRN Electronic Journal, 2000
This paper examines whether the discount of diversified firms can actually be attributed to diversification itself, using recent econometric developments about causal inference with non-experimental data. The effect of diversification on firm value is unbiasedly estimated by matching diversified and single-segment firms on the propensity score??the ...
openaire   +2 more sources

Efficient Diversification of Web Search Results [PDF]

open access: yes, 2011
In this paper we analyze the efficiency of various search results diversification methods. While efficacy of diversification approaches has been deeply investigated in the past, response time and scalability issues have been rarely addressed.
Capannini, Gabriele   +3 more
core   +1 more source

Morphological characterization of fungi associated with the ascochyta blight complex and pathogenic variability of Mycosphaerella pinodes on field pea crops in central Alberta

open access: yesCrop Journal, 2015
Field pea crops in central Alberta were surveyed for ascochyta blight from 2011 to 2012 and fungal isolates were recovered from foliar lesions on selected plants.
Hafiz Ahmed   +7 more
doaj   +1 more source

Rapid incidence estimation from SARS-CoV-2 genomes reveals decreased case detection in Europe during summer 2020

open access: yesNature Communications, 2021
The true number of infections from SARS-Cov-2 is unknown and believed to exceed the reported numbers by several fold. National testing policies, in particular, can strongly affect the proportion of undetected cases.
Maureen Rebecca Smith   +5 more
doaj   +1 more source

Diversification in the international construction business [PDF]

open access: yes, 2017
Economic globalization has created an interdependent market that allows companies to transcend traditional national boundaries to conduct business overseas. In the international construction market, companies often adopt diversification as a strategy for
Flanagan, Roger   +3 more
core   +2 more sources

Home - About - Disclaimer - Privacy