Pål Thorvaldsen
Research Scientist
(+47) 406 21 869
pal.thorvaldsen@nibio.no
Place
Trondheim
Visiting address
Klæbuveien 153, bygg C 1.etasje, 7031 Trondheim
Abstract
The 2025 update of the Norwegian Red List shows that coastal heathlands remain threatened. Key ongoing threats include abandonment of traditional land use and development of the areas. Recently compiled statistics from habitat mapping provide insights into the ecological condition of the heathlands. The data reveal that more than half of the remaining coastal heathland areas lack active management, putting them at risk of encroachment in the coming years. Moreover, data show that the proportion of areas in the late successional phase is surprisingly low, just over ten percent, despite widespread degradation due to encroachment. This suggests that degraded coastal heathlands are difficult to identify and are likely being misclassified as other habitat types, such as forest. To help field surveyors avoid misidentification, a map illustrating the potential distribution of coastal heathlands in Norway has been developed, along with clear inclusion and exclusion principles. The map extends the previously known northern range of heathlands and reaches south eastward toward heathland areas in Sweden. Norway currently lacks representative monitoring of coastal heathland, as existing programs miss rare habitats. It is therefore a welcome step that the Norwegian Environment Agency now proposes the development of a dedicated monitoring program.
Authors
Even Unsgård Erling Meisingset Inger Maren Rivrud Gunn Randi Fossland Pål Thorvaldsen Vebjørn Veiberg Atle MysterudAbstract
No abstract has been registered
Authors
Timothy Ohlert Melinda D. Smith Scott L. Collins Alan K. Knapp Jeffrey S. Dukes Osvaldo Sala Kate D. Wilkins Seth M. Munson Maggie I. Anderson Meghan L. Avolio Anping Chen Meghan T. Hayden Martin C. Holdrege Ingrid J. Slette Peter Wilfahrt Claus Beier Lauchlan H. Fraser Anke Jentsch Michael E. Loik Yiqi Luo Fernando T. Maestre Richard P. Phillips Sally A. Power Laura Yahdjian Qiang Yu Angel Chen Andrew J. Felton Laureano A. Gherardi Nicholas J. Lyon Hamed Abdoli Mehdi Abedi Juan Alberti Antonio I. Arroyo Heidi Asbjornsen Harald Auge Seton Bachle Michael Bahn David C. Bartholomew Amgaa Batbaatar Taryn L. Bauerle Karen H. Beard Kai Behn Ilka Beil Lucio Biancari Irmgard Blindow Viviana Florencia Bondaruk Elizabeth T. Borer Edward W. Bork Carlos Martin Bruschetti Kerry M. Byrne James F. Cahill Dianela A. Calvo Michele Carbognani Cameron N. Carlyle Karen Castillioni Miguel Castillo-Garcia Manjunatha H. Chandregowda Scott X. Chang Jeff Chieppa Amber C. Churchill Marcus Vinicius Cianciaruso Amanda L Cordeiro Sara A. O. Cousins Daniela F. Cusack Sven Dahlke Pedro Daleo Lee H. Dietterich Maren Dubbert Nico Eisenhauer T’ai G. W. Forte Flavia A. Funk Darcy Galiano Aaron C. Greenville Liebao Han Siri Vatsø Haugum Yann Hautier Andy Hector Hugh A. L. Henry Daniela Hoss Forest Isbell Samuel E. Jordan Yuguang Ke Eugene F. Kelly Sally E. Koerner Juergen Kreyling György Kröel-Dulay Alicia I. Kröpfl Angelika Kübert Andrew Kulmatiski Eric G. Lamb Klaus Steenberg Larsen Steven Lee Smriti Pehim Limbu Anja Linstädter Shirong Liu Grisel Longo Alejandro Loydi Junwei Luan F. Curtis Lubbe Andrey V. Malyshev Cameron D. McIntire Daniel B. Metcalfe Malesela Vincent Mokoka Akira S. Mori Edwin Mudongo Gregory S. Newman Uffe N. Nielsen Raúl Ochoa-Hueso Rory C. O’Connor Romà Ogaya Gastón R. Oñatibia Ildikó Orbán Brooke B. Osborne Rafael Otfinowski Meelis Pärtel Jesús Pascual Josep Peñuelas Pablo L. Peri David S. Pescador Guadalupe Peter Alessandro Petraglia Catherine Picon-Cochard Valério D. Pillar Juan M. Piñeiro-Guerra Laura Weber Ploughe Robert M. Plowes Cristy Portales-Reyes Suzanne M. Prober Yolanda Pueyo Golsa Rahmati Sasha C. Reed Dana Aylén Rodríguez William E. Rogers Christiane Roscher David W. Rowley Ana M. Sánchez Bráulio A. Santos Michael P. Schellenberg Michael Scherer-Lorenzen Eric W. Seabloom Ruonan Shen Baoku Shi Lara Souza Andreas Stampfli Rachel J. Standish Marcelo Sternberg Wei Sun Marie Sünnemann Michelle Tedder Tyson J. Terry Pål Thorvaldsen Katja Tielbörger Maud Tissink Matthew A. Vadeboncoeur Alejandro Valdecantos Liesbeth van den Brink Vigdis Vandvik Liv Guri Velle Svenja Wanke Glenda M. Wardle Cunzheng Wei Christiane Werner Georg Wiehl Jennifer L. Williams Amelia A. Wolf Honghui Wu Chong Xu Xuechen Yang Yadong Yang Jenifer L. Yost Alyssa L. Young Ping Yue Juan M. Zeberio Michaela Zeiter Haiyang Zhang Juntao Zhu Xiaoan ZuoAbstract
As droughts become longer and more intense, impacts on terrestrial primary productivity are expected to increase progressively. Yet, some ecosystems appear to acclimate to multiyear drought, with constant or diminishing reductions in productivity as drought duration increases. We quantified the combined effects of drought duration and intensity on aboveground productivity in 74 grasslands and shrublands distributed globally. Ecosystem acclimation with multiyear drought was observed overall, except when droughts were extreme (i.e., ≤1-in-100-year likelihood of occurrence). Productivity losses after four consecutive years of extreme drought increased by ~2.5-fold compared with those of the first year. These results portend a foundational shift in ecosystem behavior if drought duration and intensity increase, from maintenance of reduced functioning over time to progressive and profound losses of productivity when droughts are extreme.