plant decline – Page 2 – Desdemona Despair

Map showing the coefficient of variation of precipitation (CVP) and its historical and projected changes in the continental United States. (A and B) Historical (1981–2010) CVP from PRISM for the cool and warm seasons, respectively. The bounding box in (A) indicates the Southwest region used for subsequent regional analyses. (C and D) PRISM-estimated historical change in CVP (∆CVPhistorical) from the early 20th century (1901–1930) to the late 20th/early 21st century (1981–2010) for the cool and warm seasons. Graphic: Dannenberg, et al., 2019 / Science Advances

October 3, 2019

Extreme rainfall variability driving tree growth reductions in western U.S. – “Key Southwest tree species may be at risk as precipitation extremes intensify”

By Rosemary Brandt 2 October 2019 (UA News) – As the Earth’s temperature warms, its hydrological cycle kicks into overdrive – wet years get wetter, and dry years get drier. According to a new University of Arizona-led study, these increased rainfall extremes could have dire consequences for the semi-arid forests of the western U.S. “In […]

Aerial view of damaged mangroves from a 2019 monitoring trip in the Gulf of Carpentaria. A cascade of impacts including rising sea levels, heatwaves and back-to-back tropical cyclones has created 400km of dead and badly damaged mangroves in the Gulf of Carpentaria. A cascade of impacts including rising sea levels, heatwaves and back-to-back tropical cyclones has created 400km of dead and badly damaged mangroves in the Gulf of Carpentaria. Photo: Norman Duke

October 3, 2019

Shocked scientists find 400 km of dead and damaged mangroves in Australia’s Gulf of Carpentaria – “We are getting these compounding effects that we just didn’t expect”

By Graham Readfearn 3 October 2019 (The Guardian) – A cascade of impacts including rising sea levels, heatwaves and back-to-back tropical cyclones has created 400 kilometers [249 miles] of dead and badly damaged mangroves in the Gulf of Carpentaria, a scientific monitoring trip has discovered. Prof Norman Duke, of James Cook University, spent 10 days […]

The distribution of threatened tree species, Critically Endangered, Endangered, or Vulnerable (CR, EN, and VU), in Europe. Data: European Red List of trees 2019. Graphic: IUCN

October 1, 2019

More than half of Europe’s endemic trees face extinction – “This report shows how dire the situation is for many overlooked, undervalued species that form the backbone of Europe’s ecosystems”

GLAND, Switzerland, 27 September 2019 (IUCN) – Over half (58 percent) of Europe’s endemic trees are threatened with extinction, according to assessments of the state of the continent’s biodiversity published today by the International Union for Conservation of Nature (IUCN). The introduction of invasive species, unsustainable logging and urban development are key threats causing the […]

Comparison of normalized difference vegetation index (NDVI) trends over the globally vegetated areas between two periods of 1982–1998 and 1999–2015. (A) NDVI trend of 1982–1998. (B) NDVI trend of 1999–2015. (C) Differences of NDVI trend between 1999–2015 and 1982–1998. The insets (I) show the relative frequency (percent) distribution of significant decreases (Dec*; P < 0.05), decreases (Dec), increases (Inc), and significant increases (Inc*), and the insets (II) show the frequency distributions of the corresponding ranges. Graphic: Yuan, et al., 2019 / Science Advances

August 20, 2019

Atmospheric vapor deficit causing worldwide loss of vegetation

By Bob Yirka 15 August 2019 (Phys.org) – A large international team of researchers has found evidence of a connection between an increase in the atmospheric vapor deficit and worldwide vegetation loss. In their paper published in the journal Science Advances, the group describes their analysis of climate datasets and the correlation of an increase in […]

Scatterplot showing key bumblebee flight performance indicator of endurance, distance flown in meters (A) for both the control (red circle) and pesticide‐treated (blue triangle) groups. Graphic: Kenna, et al., 2019 / Ecology and Evolution

July 26, 2019

Pesticide exposure causes bumblebee flight to fall short – “The negative effects of pesticide exposure on flight endurance have the potential to reduce the area that colonies can forage for food”

By Hayley Dunning 30 April 2019 (Imperial College London) – Bees exposed to a neonicotinoid pesticide fly only a third of the distance that unexposed bees are able to achieve. Flight behaviour is crucial for determining how bees forage, so reduced flight performance from pesticide exposure could lead to colonies going hungry and pollination services […]

Deltoid spurge, shown here in 2005, is one of the endangered plants found only on pine rockland. The pine rockland found near Zoo Miami is the largest intact tract outside Everglades National Park. A 2015 study found 55 plant species in the tract, far more than botanists found in rockland in the park. Photo: Donna E. Natale Planas / Miami Herald

June 29, 2019

Activists lose last legal battle to protect rare Miami forest from Walmart development

By Adriana Brasileiro 19 June 2019 MIAMI (Miami Herald) – Activists fighting to preserve a slice of one of the world’s rarest forests lost what was likely the last legal battle to stop the imperiled ecosystem from turning into a Walmart-anchored development. One of the last remnants in Miami-Dade of pine rockland, a forest that […]

The Chilean crocus, Tecophilaea cyanocrocus. Photo: Richard Wilford

June 12, 2019

Almost 600 plant species have already gone extinct – “Plant extinction is bad news for all species”

By Amanda Gonzalez Bengtsson 11 June 2019 (Stockholm University) – For the first time ever, scientists at the Royal Botanic Gardens, Kew and Stockholm University, have compiled a global analysis of all plant extinction records documented from across the world. This unique dataset published today in leading journal, Nature Ecology & Evolution, brings together data […]