scholarly journals Impacts of soil water stress on the acclimated stomatal limitation of photosynthesis: Insights from stable carbon isotope data

2020 ◽  
Vol 26 (12) ◽  
pp. 7158-7172
Author(s):  
Aliénor Lavergne ◽  
David Sandoval ◽  
Vincent J. Hare ◽  
Heather Graven ◽  
Iain Colin Prentice
Keyword(s):  
Water Stress ◽  
Soil Water ◽  
Carbon Isotope ◽  
Stable Carbon Isotope ◽  
Stable Carbon ◽  
Stomatal Limitation ◽  
Isotope Data ◽  
Soil Water Stress

scholarly journals Employing extant stable carbon isotope data in Gulf of Mexico sedimentary organic matter for oil spill studies

2016 ◽  
Vol 129 ◽  
pp. 249-258 ◽  
Author(s):  
Brad E. Rosenheim ◽  
Matthew A. Pendergraft ◽  
George C. Flowers ◽  
Robert Carney ◽  
José L. Sericano ◽  
...  
Keyword(s):  
Organic Matter ◽  
Gulf Of Mexico ◽  
Carbon Isotope ◽  
Oil Spill ◽  
Stable Carbon Isotope ◽  
Sedimentary Organic Matter ◽  
Stable Carbon ◽  
Isotope Data

Recent origin of a large part of the forest cover in the Gabon coastal area based on stable carbon isotope data

Oecologia ◽  
2001 ◽  
Vol 129 (1) ◽  
pp. 106-113 ◽  
Author(s):  
Marie-Anne Delègue ◽  
Marc Fuhr ◽  
Dominique Schwartz ◽  
André Mariotti ◽  
Robert Nasi
Keyword(s):  
Carbon Isotope ◽  
Coastal Area ◽  
Forest Cover ◽  
Stable Carbon Isotope ◽  
Stable Carbon ◽  
Isotope Data ◽  
Recent Origin

A Late Ordovician age for the Whirlpool and Power Glen formations, New York

2016 ◽  
Vol 53 (7) ◽  
pp. 739-747 ◽  
Author(s):  
Laurenz Schröer ◽  
Thijs R.A. Vandenbroucke ◽  
Olle Hints ◽  
Thomas Steeman ◽  
Jacques Verniers ◽  
...  
Keyword(s):  
New York ◽  
Carbon Isotope ◽  
Stable Carbon Isotope ◽  
Late Ordovician ◽  
Stable Carbon ◽  
Fossil Assemblage ◽  
Isotope Data ◽  
Glomalean Fungi

A restudy of the palynology of the Whirlpool Formation and Power Glen Formation in New York (USA) yielded a diverse fossil assemblage with cryptospores, glomalean fungi, acritarchs, chitinozoans, scolecodonts, and small carbonaceous fossils. These new data, and particularly the presence of the chitinozoan index fossil Hercochitina crickmayi, combined with emerging stable carbon isotope data, suggest a Late Ordovician (Katian or Hirnantian) age for these formations, which is older than their previously suggested Silurian (Rhuddanian) age.

scholarly journals Thirst or Malnutrition: The Impacts of Invasive Insect Agrilus mali on the Physiological Status of Wild Apple Trees

Forests ◽  
2020 ◽  
Vol 11 (4) ◽  
pp. 440 ◽  
Author(s):  
Ping Zhang ◽  
Zhijun Cui ◽  
Hao Xu ◽  
Abid Ali ◽  
Xin Zhang ◽  
...  
Keyword(s):  
Water Stress ◽  
Carbon Isotope ◽  
Isotope Ratio ◽  
Stable Carbon Isotope ◽  
Carbon Isotope Ratio ◽  
Mineral Nutrient ◽  
Stable Carbon ◽  
Stable Carbon Isotope Ratio ◽  
Apple Trees ◽  
Total N

Malus sieversii (Ledeb.) M. Roem is a tertiary relict tree species and a rare and valuable resource for germplasm conservation. Since 1995, its wild forest has been severely destroyed by a devastating wood-boring beetle Agrilus mali Matsumura (Coleoptera: Buprestidae) in Xinjiang Uygur Autonomous Region, China. Where it invaded, this beetle infested more than 95% of the forests, and 80% of wild apple trees were reported dead in the hotspots. The physiological damage by A. mali infestation and their causality to tree death remain unclear. In this study, we attempted to explain the wild apple dieback from plant physiological perspectives, based on the hypothesis that the more damage M. sieversii suffered from the infestation of A. mali, the less water and fewer nutrients it could utilize. The study was conducted on trees with different extents of damage in wild apple forests over a large scale during 2016 and 2017. The stable carbon isotope ratio in leaves was analyzed to indicate tree water stress status. Total N, total P, total K, Ca2+ and Mg2+ were analyzed to reflect plant mineral nutrient status. The extent of damage was significantly associated with the leaf stable carbon isotope ratio in the drier year of 2016, but not significantly in 2017 with heavy rainfall in spring. The mineral nutrient contents of leaves were not significantly different among the four damage rankings in either year. The water stress experienced by M. sieversii was aggravated by the damage caused by A. mali, especially in a drought year, and indicates that the long-term water deficit caused by A. mali infestation may be the key factor leading to the decline of wild apple forests. The finding suggests the necessity of aerial irrigation for sustainable integrated pest management in wild apple trees.

scholarly journals Photosynthetic activity in Devonian Foraminifera

2021 ◽  
Vol 18 (20) ◽  
pp. 5719-5728
Author(s):  
Zofia Dubicka ◽  
Maria Gajewska ◽  
Wojciech Kozłowski ◽  
Pamela Hallock ◽  
Johann Hohenegger
Keyword(s):  
Coral Reefs ◽  
Carbon Isotope ◽  
Surface Waters ◽  
Photosynthetic Activity ◽  
Stable Carbon Isotope ◽  
Stable Carbon ◽  
Dissolved Nutrients ◽  
Marine Communities ◽  
Isotope Data ◽  
Evolutionary Radiation

Abstract. Photosynthetically active foraminifera are prolific carbonate producers in warm, sunlit, surface waters of the oceans. Foraminifera have repeatedly developed mixotrophic strategies (i.e., the ability of an organism or holobiont to both feed and photosynthesize) by facultative or obligate endosymbiosis with microalgae or by sequestering plastids (kleptoplasts) of ingested algae. Mixotrophy provides access to essential nutrients (e.g., N, P) through feeding while providing carbohydrates and lipids produced through photosynthesis, resulting in substantial energetic advantage in warm, sunlit environments where food and dissolved nutrients are scarce. Our morphological as well as stable carbon isotope data provide, as of now, the earliest (Mid-Devonian) evidence for photosynthetic activity in the first advanced, multichambered, calcareous foraminifera, Semitextularia, from the tropical shelf of the Laurussia paleocontinent. This adaptation likely influenced the evolutionary radiation of calcareous Foraminifera in the Devonian (“Givetian revolution”), one of the most important evolutionary events in foraminiferal history, that coincided with the worldwide development of diverse calcifying marine communities inhabiting shelf environments linked with Devonian stromatoporoid coral reefs.

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