Search results
Results from the WOW.Com Content Network
Pollinator decline is the reduction in abundance of insect and other animal pollinators in many ecosystems worldwide that began being recorded at the end of the 20th century. Multiple lines of evidence exist for the reduction of wild pollinator populations at the regional level, especially within Europe and North America.
The phenomenon is particularly important for crops such as almond growing in California, where honey bees are the predominant pollinator and the crop value in 2011 was $3.6 billion. [199] In 2000, the total U.S. crop value that was wholly dependent on honey bee pollination was estimated to exceed $15 billion. [ 200 ]
Plants grow faster in presence of increased CO 2 (due to the CO 2 fertilisation effect) but the resulting plant biomass contains fewer nutrients. [35] While some species such as flies and cockroaches might increase as a result, [6] the total biomass of insects is estimated to be decreasing by between about 0.9 to 2.5% per year. [36] [12
Monarch butterflies, known for migrating thousands of miles (km) across North America, have experienced a decades-long U.S. population decline due to habitat loss caused by human activities such ...
We rely on the food crops that pollinators help to grow, but populations have declined sharply in recent years due to factors like climate change, use of pesticides, and loss of habitat.
In California, almond pollination occurs in February, early in the growing season before local hives have built up their populations. Almond orchards require two hives per acre, or 2,000 m 2 (22,000 sq ft) per hive, for maximum yield, and pollination is dependent on the importation of hives from warmer climates.
California Gov. Gavin Newsom declared a state of emergency Wednesday to combat bird flu, which has spread to more than a quarter of all the state's dairies in the last month and infected 34 state ...
It is especially abundant, along with X. sonorina, in the Central Valley and in Southern California, including the Mojave Desert. They are agriculturally beneficial insects and pollinators of diverse California chaparral and woodlands and desert native plant species. [4] [5] This carpenter bee is active during hot seasons. Therefore, they are ...