They are all very knowledgeable about the bees and quite proud of their beekeeping background.Īs of today, all three children have left the home hive, but keep in close touch and help when they can. All three children grew up around the bees and have been a wonderful help when the work needed done. We added Jeffrey Dean in 1975, Jason David in 1976, and Jaclyn Marie in 1982. The study was funded in part by the Chinese Academy of Sciences and the National Natural Science Foundation of China.As time went on, we bought the home built by Jim's great grandfather and increased the number of our hives and the size of our family. "If we design our cities better in terms of what they offer to pollinators, we can at least compensate for some of the negative consequences of urban growth," concludes Panagiotis Theodorou. The analysis shows, for example, that cities with a greater diversity of flowers are usually home to more and many different types of pollinators. The study provides important information to protect biodiversity and for sustainable urban development. While this is good for urban plants, it can negatively impact other pollinators because honeybees often displace other native pollinators and can transmit diseases to wild pollinators. "Honeybees are very productive and are kept by hobby beekeepers in many places," says Liang. According to the researchers, this is mainly due to honeybees, which, together with bumblebees, compensate for the reduction in urban pollinator diversity. Pollinators still regularly pollinate plants, which produced enough seeds to propagate. However, the studies show that the declining numbers do not necessarily result in a decrease in pollination performance. Less affected, on the other hand, are wild bees that nest above ground, in cavities or insect hotels. Wild bees that nest in the ground often lack suitable breeding sites in cities and their populations are declining. Also particularly affected are pollinators that are already active in early spring and feed on the nectar and pollen of early flowering plants. Huan Liang from Wuhan Botanical Garden, Chinese Academy of Sciences. Since these are found less and less in cities, the populations of many butterfly species are also declining," explains Dr. They depend on very specific plants for their nutrition and larval development. "Butterflies are particularly susceptible to changes in their environment. The team found that butterflies were the most negatively impacted. However, certain groups are more affected than others. The results paint a clear picture: "As urbanisation increases, the abundance and biodiversity of many pollinators decrease," says Theodorou. The analysis takes into account all of the Earth's continents with the exception of Antarctica. In order to obtain a global overview, he and researchers from the Chinese Academy of Sciences analysed data from 133 individual studies that looked at how urban growth impacts pollinators and their pollination performance. Because this work is very complex and time-consuming, the studies are usually limited to specific cities or regions," explains biologist Dr Panagiotis Theodorou from MLU. "There are many studies that have examined the relationship between urbanisation, pollinators and pollination performance and have found negative effects. Pollinators, whose work is essential for a thriving ecosystem and hence human food security, are particularly affected. The result: impervious surfaces, a reduction in plant diversity and more environmental pollution, such as light and air pollution. Cities are expanding all over the world and this is having a significant impact on the habitats of many animal species.
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