22
Jul
(Beyond Pesticides, July 22, 2026) A study of aquatic macroinvertebrates, including insects in their nymph and larval stages, snails, worms, crayfish, and clams, finds that pesticide exposure leads to biodiversity declines. Published in Environment International, this research also finds that multiple stressors and chemical mixtures increase ecosystem effects. “The individual and interactive impacts of pesticide contamination and other environmental stressors on freshwater macroinvertebrates remain insufficiently quantified under real-world, multi-stressor conditions,” the authors note. This research addresses that gap, identifying pesticide pollution as a threat to aquatic organisms and ecosystem functioning. In studying the Wei River Basin, one of the most intensively managed agricultural and urban regions in China, the data reveals that “pesticides contributed more than 40% to both [Alpha] α-diversity loss (species richness) and [Beta] β-diversity nestedness [hierarchical interconnectedness], exceeding the combined effect of the other factors that were considered.” Additional results, such as interactive effects between pesticides and land use, show that during the dry season there is “a 2.1-fold increase in functional sensitivity and a 56% rise in interaction contributions.” Ecological harm thresholds are also highest for the neonicotinoid insecticide imidacloprid, followed by the herbicides hexazinone, atrazine, and simazine. Study Importance Freshwater ecosystems, such as lakes, rivers, […]
Posted in Agriculture, Aquatic Organisms, Atrazine, Beneficials, Biodiversity, contamination, Ecosystem Services, Herbicides, hexazinone, Imidacloprid, Insecticides, International, neonicotinoids, Pesticide Mixtures, simazine, synergistic effects, Water, Wildlife/Endangered Sp. | No Comments »
15
Jul
(Beyond Pesticides, July 15, 2026) Researchers at the U.S. Geological Survey and Portland and Oregon State Universities, in a study reported in Marine Pollution Bulletin, find that pesticide exposure, including the herbicide atrazine and fungicide carbendazim, found in combination with the herbicide diuron in the environment, significantly impacts reproductive organ development in sea anemone (Anthopleura elegantissima), an important organism in the marine environment. “Sea anemone [is] any member of the invertebrate order Actiniaria (class Anthozoa, phylum Cnidaria), soft-bodied, primarily sedentary marine animals resembling flowers,” according to the Encyclopedia Britannica. According to the Convention on Biological Diversity, marine ecosystems store about 15 times more carbon emissions than terrestrial and soil ecosystems, while “oceans represent 95 percent of the [planet’s] biosphere.” Sea anemones are critical to protecting marine biodiversity by acting like microhabitats for small invertebrates such as opalescent nudibranchs and amphipods (beneficial crustaceans), serving as a food source for marine predators including sea stars and slugs, contributing to nutrient cycling by consuming passing crustaceans, among other benefits. (See here, here, here, and here.) For example, sea anemones provide protection and nutrients to Red Sea clownfish (Amphiprion bicinctus), and in return these fish offer a nature-based solution to ventilation, nitrogen, and carbon to the host and its […]
Posted in Aquatic Organisms, Atrazine, Beneficials, Biodiversity, Carbendazim, Chemical Mixtures, Diuron, Endangered Species Act (ESA), Oceans, Pesticide Drift, Pesticide Mixtures, Uncategorized, Water, Wildlife/Endangered Sp. | No Comments »
09
Jul
(Beyond Pesticides, July 9, 2026) In a study published in PLOS One, researchers identify “ecological cascades triggered by intensive, calendar-based pesticide applications,” resulting in “agricultural pesticide regimes [that] fundamentally restructure insect foraging networks through complex, poorly understood community-level pathways.” In comparing chemical-intensive apple orchards with adjacent pesticide-free cemeteries, this study documents the impacts on insect biodiversity with exposure to pesticides, noting that in areas without pesticide applications insect abundance and richness is higher and plant-pollinator networks are stronger. When applying pesticides during peak insect activity, apple orchards create ecological traps and insect pollinator foraging network disruption with cascading effects through the ecosystem that extend beyond acute toxicity. As the authors explain: “The resulting exposure drives sublethal behavioural changes, forcing insects into narrower dietary niches and collapsing the complex web of plant-pollinator interactions. The final outcome is a functionally homogenized insect community, stripped of its diversity and resilience.” To sustain ecological integrity and insect biodiversity, as well as the subsequent ecosystem services they provide, such as pollination, pesticide-free habitats are essential. This study adds to the wide body of science that supports the urgent need for a widescale transition to organic agriculture and land management. Study Importance and Background Nontarget and […]
Posted in Agriculture, Alternatives/Organics, Beneficials, Biodiversity, Chemicals, Ecosystem Services, India, Pollinators, Uncategorized, Wildlife/Endangered Sp. | No Comments »
13
Feb
(Beyond Pesticides, February 13, 2026) In a novel, continent-wide study of soil biodiversity throughout Europe published in Nature, researchers find 70% of the sampled sites contain pesticide residues, which “emerged as the second strongest driver of soil biodiversity patterns after soil properties,” particularly in croplands. As soil biodiversity is key for ecosystem functioning, agricultural and land management practices that safeguard biodiversity are imperative. This study, however, highlights how pesticides alter microbial functions, including phosphorus and nitrogen cycling, and suppress beneficial taxa, such as arbuscular mycorrhizal fungi and bacterivore nematodes, and adds to a wide body of science that links pesticide residues in soil to adverse effects on biodiversity. In analyzing 373 sites across woodlands, grasslands, and croplands in 26 European countries, and examining the effects of 63 pesticides on soil archaea, bacteria, fungi, protists, nematodes, arthropods, and key functional gene groups, the data reveals “organism- and function-specific patterns, emphasizing complex and widespread non-target effects on soil biodiversity.” As the authors state, “[T]o our knowledge, ours is the first study to demonstrate the relative importance of pesticides in comparison to soil properties, ecosystem type and climate at a continental scale.” Study Importance As Kristin Ohlson describes in her book The Soil […]
Posted in Agriculture, aminomethylphosphonic acid (AMPA), Beneficials, Biodiversity, boscalid, Carbendazim, diflufenican, Ecosystem Services, European Union, fluopyram, Glyphosate, Pendimethalin, Pesticide Residues, soil health, Soil microbiome | No Comments »
