Mejorando las estimaciones de la abundancia de los peces costeros del Mediterráneo

Conocer cuántos peces hay en nuestras costas es esencial para proteger los ecosistemas marinos y asegurar una gestión sostenible de los recursos. En este estudio, demostramos que el ADN que hay en agua de mar puede ser una herramienta clave para ayudar a predecir mejor la abundancia de dichos peces. Contar peces no siempre es tarea fácil. Los métodos tradicionales, como la pesca, pueden ser … Continue reading Mejorando las estimaciones de la abundancia de los peces costeros del Mediterráneo

Comment mieux estimer l’abondance locale des poissons côtiers de Méditerranée

Estimer combien de poissons vivent dans les zones côtières est essentiel pour protéger les écosystèmes marins et gérer durablement les ressources. Dans cette étude, nous montrons que l’ADN présent dans l’eau de mer peut aider à mieux prédire l’abondance des poissons. En effet, compter les poissons n’est pas toujours simple. Les méthodes classiques, comme les captures de pêche, peuvent être coûteuses, destructrices ou difficiles à … Continue reading Comment mieux estimer l’abondance locale des poissons côtiers de Méditerranée

How to better estimate local abundance of Mediterranean coastal fish

Estimating how many fish live in coastal areas is essential for protecting marine ecosystems and managing resources sustainably. In this study, we show that DNA present in seawater can help better predict fish abundance. Indeed, counting fish is not always easy. Traditional methods, such as fishing catches, can be costly, destructive, or difficult to implement in certain protected or dangerous areas. A recent method involves … Continue reading How to better estimate local abundance of Mediterranean coastal fish

Creating small clearings helps herbivores keep trees from taking over savannas

In many parts of the world, grasslands and savannas are being taken over by trees. This change reduces biodiversity and alters how these ecosystems work. We wanted to test a simple, low-cost way to slow this process and help restore open grassy areas. In our study, we created small clearings (“glades”) by cutting trees in a heavily wooded savanna in South Africa. We compared these … Continue reading Creating small clearings helps herbivores keep trees from taking over savannas

Conservation is becoming more evidence-based, but it still has a long way to go

Written by Alec Christie, Centre for Environmental Policy, Imperial College London. For more than two decades, conservationists have been encouraged to use the best available evidence to inform their decisions – a concept called ‘Evidence-based Conservation’. The idea is simple: rather than relying only on personal experience, tradition, or intuition, practitioners should draw on evidence from the wider literature and other forms of knowledge to … Continue reading Conservation is becoming more evidence-based, but it still has a long way to go

Species lists can mislead: Island management should map species interactions

Seed dispersal is essential for plant regeneration, especially on islands where many plants rely on animals to move seeds to safe places to survive. But because this process is hard to observe directly, conservation decisions often fall back on easier measures such as species counts. This can be misleading, because ecosystems are not only defined by the species they contain, but also by the relationships … Continue reading Species lists can mislead: Island management should map species interactions

Grazing intensity, duration, and regime and livestock type modulate soil microbiota responses

Grasslands account for approximately 40% of the Earth’s land area and are the largest natural ecosystem apart from forests. Livestock grazing is currently the most important human activity in grasslands, with a persistent and strong impact on both the aboveground plant community and underground organisms. Soil microbiota are the most numerous, most diverse, and functionally crucial biological group on the planet. Among them, microbes and … Continue reading Grazing intensity, duration, and regime and livestock type modulate soil microbiota responses

Navegando los obstáculos del río: La influencia de la tipología de presas de baja altura y la hidrología fluvial en la conectividad genética de los peces

Los ríos están llenos de pequeñas represas que vuelven el curso del agua más lento y complican el desplazamiento de organismos acuáticos (por ejemplo, de los peces). Estas pequeñas represas por lo general solo tienen unos metros de altura y están presentes a través del mundo. Ya que no es posible eliminar todas estas represas, es fundamental identificar cuáles (o más bien qué características) representan … Continue reading Navegando los obstáculos del río: La influencia de la tipología de presas de baja altura y la hidrología fluvial en la conectividad genética de los peces

Naviguer à travers les obstacles fluviaux : L’influence de la typologie des barrages de faible hauteur et de l’hydrologie des rivières sur la connectivité génétique des poissons

Les rivières sont parsemées de petits barrages qui ralentissent l’eau et compliquent les déplacements des organismes aquatiques, tels que les poissons. Ces petits barrages mesurant généralement quelques mètres de haut sont des millions dans le monde. Comme il est impossible de tous les supprimer, il est essentiel d’identifier ceux qui posent les plus gros problèmes pour le déplacement de la faune aquatique. Dans notre étude, … Continue reading Naviguer à travers les obstacles fluviaux : L’influence de la typologie des barrages de faible hauteur et de l’hydrologie des rivières sur la connectivité génétique des poissons

Navigating river obstacles: The influence of the typology of low-head dams and river hydrology on fish genetic connectivity

Rivers are dotted with countless small dams that slow the flow of water and disrupt connections between fish populations. These structures, known as low-head dams, typically stand only a few metres tall, yet millions exist worldwide. Since removing all of them is unrealistic, it is crucial to identify which ones most strongly hinder aquatic wildlife movement. In our study, we set out to understand how … Continue reading Navigating river obstacles: The influence of the typology of low-head dams and river hydrology on fish genetic connectivity