Core Viewpoint - The invasive species nutria is increasingly threatening flood safety and ecosystems in Germany, as reported by the German Hunting Association [1][2] Group 1: Invasive Species Impact - In 2023, nutria was found in approximately 35% of surveyed hunting areas, doubling from 2015 [1] - In Bremen and Hamburg, up to 93% and 74% of hunting areas respectively reported the presence of nutria, indicating significant urban infiltration [1] - Nutria burrow tunnels several meters long along riverbanks and levees, posing risks to flood safety in coastal and inland river areas [1] Group 2: Ecological Consequences - Nutria particularly damage reed beds, which can lead to the complete loss of reed coverage along riverbanks, severely impacting biodiversity [1] - Reed beds are crucial breeding habitats for insects, amphibians, fish, and birds due to their slower water flow [1] Group 3: Historical Context and Call to Action - Nutria were introduced to Germany in the 19th century for meat and fur production, and have since established stable populations in the wild [2] - Factors such as feeding by humans, climate change, and hunting restrictions have contributed to their prevalence in urban areas [2] - The German Hunting Association urges government levels, city managers, and the public to collaborate in controlling the spread of nutria [2]

Core Viewpoint - The sale of "wild turtles" in various locations has raised concerns, as these turtles are primarily identified as Florida softshell turtles, an invasive species that poses ecological threats and is unsuitable for consumption or release into the wild [1][4][19] Group 1: Identification and Characteristics of Florida Softshell Turtle - Florida softshell turtles, also known as pearl turtles, have a smooth, oval shape, medium-sized head, and robust limbs with webbed feet [5] - They are native to the United States and primarily feed on soft-bodied animals, crustaceans, and fish, exhibiting rapid growth and strong adaptability [7] Group 2: Ecological Impact - Upon being released into Chinese waters, Florida softshell turtles can aggressively compete for territory, threatening native turtle populations and overall biodiversity, earning them the title of "freshwater tyrants" [8] - The article highlights other invasive species that pose similar ecological risks, such as Canadian goldenrod, smooth cordgrass, and apple snails, which disrupt local ecosystems and agricultural practices [9][11][13][14][15] Group 3: Recommendations and Actions - The article emphasizes that releasing animals into the wild does not equate to doing good; instead, it can have detrimental effects on ecosystems [17] - It advises the public to report the sale of such animals and to engage in responsible wildlife management practices, including only releasing native species and supporting conservation efforts [17][19]

Core Viewpoint - The article discusses the issue of invasive species in Guangdong Province, highlighting their ecological impact and the need for effective control measures [4][39]. Invasive Species Overview - Guangdong is one of the regions in China with the highest number of invasive species, with hundreds identified that threaten local ecosystems and agricultural safety [4][5]. - Invasive species can damage crops, outcompete native plants, and disrupt ecological balance due to the absence of natural predators [5][6]. Specific Invasive Species 1. Pomacea canaliculata (Golden Apple Snail) - Originally from the Amazon basin, this species was introduced to China in the 1980s and has rapidly spread in Guangdong's rice fields [10][11]. - It has a high feeding rate, consuming up to 40% of its body weight daily, primarily targeting young rice seedlings and vegetables, which severely affects crop emergence rates [12]. - The reproductive capacity is significant, with each snail capable of laying 200-1000 eggs multiple times a year, making control efforts challenging [13][15]. 2. Mikania micrantha (Mile-a-Minute Vine) - This perennial vine, native to Central America, has spread widely in Guangdong, particularly in forested areas and orchards [20][21]. - It grows rapidly, extending over 20 cm per day, and can smother native plants, leading to their death and causing severe ecological damage [22][24]. 3. Bidens pilosa (Spanish Needle) - Originally from tropical America, this species is now common in Guangdong's farmland and wastelands [29][30]. - It has strong adaptability and prolific reproduction, competing with crops for light, water, and nutrients, which can hinder agricultural productivity [31][32]. Control Measures - The article emphasizes the importance of public participation in controlling invasive species and provides specific strategies for managing the highlighted species [37][39]. - For Pomacea canaliculata, methods include manual collection and the use of specific pesticides while adhering to safety regulations [18][16]. - For Mikania micrantha, mechanical removal and targeted herbicide application are recommended to prevent its spread [26][28]. - For Bidens pilosa, early removal before flowering and the use of selective herbicides are suggested to minimize its impact on crops [34][36].

Group 1 - The popularity of "exotic pets" in China is rising, with over 17 million people reportedly keeping them, which includes non-traditional animals like snakes, lizards, and spiders [1] - There are significant safety concerns associated with the ownership and importation of exotic pets, particularly regarding the potential ecological impact of invasive species [7][21] - Illegal importation of exotic species is occurring, with recent incidents involving travelers attempting to smuggle various foreign animals into the country [3][8] Group 2 - The introduction of foreign species can lead to severe ecological consequences, including threats to native species and agricultural production [19][23] - Specific examples of harmful invasive species include the "Canadian goldenrod" and "muti-flowered cordgrass," which have shown strong reproductive capabilities and can outcompete native flora [28][31] - The Chinese government is taking measures to combat the spread of invasive species, including a national survey every ten years and the implementation of control plans for specific invasive plants [33]