This means that 2023 threatens to be a very bad year. Because the trend itself is a downward trend: the number of butterflies has almost halved in the last 30 years. Since 1890, the number of butterflies has decreased “by at least 84 percent”.
What about other flying pollinators? There is another group of species that is structurally measured using an established measurement system: bees.
Beetles also seem to be off to a bad start this year, said Johan van Bosch of the EIS Center for Insect Knowledge. “At the end of May, only half of the bee population observed in recent years.”
Pollination researcher Constant Swinkels of Radboud University is still hopeful that the disappointing observations in early spring are due to insects hiding during rain and cold.
Bee expert Martijn Kos of the EIS said the wet months of March and April may indeed have played a role. But he’s mainly thinking about the final impact of last year’s extremely dry summer. Then the supply of nectar and pollen decreases. “Probably fewer queen bees are being produced,” says Koss. They should start a new colony the following spring.
An added blow, according to Felling too, is the extremely dry summers. “Very early species, such as the orange and lemon-headed butterflies, did well this year. But they actually completed their life cycle in June last year.” So before dehydration gets serious.
The spring butterflies that had to survive the summer as caterpillars declined sharply. “We saw far less small white cabbage and whites with tiny veins. Also little foxes and little fire moths and maps have had a very bad year.”
Other observers worry that apart from butterflies and bees, more insect populations are having a bad year. The slide appeared to be in a deplorable state, said Edward Peter de Boer, of the Fauna X environmental office.
He recently conducted a census of the Natura 2000 Drents-Friese Wold area. “The end of May is usually prime time for fly flies. We got sunshine and no shortage of nectar-rich flowers. But harvest all five times!” de Boer to NU.nl. “This year has been very quiet.”
This image has been confirmed by Cyril Liebrand of the environmental agency Eureco. Participate in plant research on flowering river dams. “I asked the people there: Look around, do you see anything? Zero point tone. It really scared me.”
Yes earlier On LinkedIn for more observer experiences. Feedback poured in from all over the Netherlands, as well as from Belgium and Germany. “I estimate two to three hundred people, always with the same guarantee: Hardly anyone will fly this year.”
Apa yang terbaik untuk serangga di why are they important?
- Pollinating insects fly from flower to flower. Minumlah nektar dengan rasa yang enak.
- Ini adalah butterflies, moths, wild bees (including bumblebees), hoverflies dan juga ahli yang ditentukan. There are a few thousand species of pollinating insects in the Netherlands.
- Serangga mungkin tidak sengaja salah menanam tanaman Anda. They can often only form seeds and fruits when flowers are fertilized with the pollen of another flower. The human food supply adalah also depends on this.
- Firstly, because of the very large number of plants, a very large number of pollinating insects is needed. In addition, adalah variation is important. Tumbuhkan tanaman dengan spesifikasi terbaik yang eel sesuai.
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2023-06-05 04:09:54
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