Results 61 to 70 of about 152,218 (276)

Technical Note: Field experiences using UV/VIS sensors for high-resolution monitoring of nitrate in groundwater [PDF]

, 2014
peer-reviewedTwo different in situ spectrophotometers are compared that were used in the field to determine nitrate-nitrogen (NO3-N) concentrations at two distinct spring discharge sites. One sensor was a double wavelength spectrophotometer (DWS) and the
Blum, P., Fenton, Owen, Goldscheider, N., Grimmeisen, F., Huebsch, Manuela, Jordan, Philip, Richards, Karl G., Sawarieh, A., Zemann, M.   +8 more
core   +4 more sources

Rediscovery of Passiflora clypeophylla (subgenus Decaloba): a highly threatened and narrow endemic species found within a karstic canyon in Guatemala

Nordic Journal of Botany, EarlyView.
Passiflora clypeophylla, an endemic species to the Guatemalan karstic forests last seen in 1889 and deemed extinct, was rediscovered in the Department of Alta Verapaz, east of Cobán. The species was known only from a single specimen hailed from the type locality, Rubel Cruz, where it has been found again. An additional location has been identified in a
J.R. Kuethe, Dennis I. Medina, Saban Sequen, Maura L. Quezada   +3 more
wiley   +1 more source

Hydrogeological conditions of karst leakage and locating of leakage channels in Biyun lake, Guizhou

Carsologica Sinica
China is a country with the widest distribution area and the most complete karst development type in the world, and its karst area accounts for about one third of China's territorial area.
Jie ZENG, Xiaodong PAN, Kun REN, Wei LIU, Cong PENG, Zhijie ZHENG   +5 more
doaj   +1 more source

On the value of water quality observations for karst model parameterization [PDF]

, 2017
If properly applied, karst hydrological models are a valuable tool for karst water resources management. If they are able to reproduce the relevant flow and storage processes of a karst system, they can be used for prediction of water resources ...
Andreo-Navarro, Bartolome, Barbera, Juan Antonio, Hartman, Andreas   +2 more
core  

Oreocharis konkakinhensis (Gesneriaceae) sp. nov. from the Central Highlands, Vietnam

Nordic Journal of Botany, EarlyView.
Oreocharis konkakinhensis, a new species of Gesneriaceae, is described and illustrated from the Central Highlands, Vietnam. The new species is morphologically most similar to Oreocharis phuongii, a recently described species from central Vietnam. However, it clearly differs from the latter by having stems without stolons, subulate bracts, yellow inner ...
Thi Thanh Dat Pham, Thao Thi Hoang, Ngan Thi Lu, Thanh Tam Ho, Fang Wen, Yu Ito, Truong Van Do   +6 more
wiley   +1 more source

Vadose zone air as a biogenic source of methane in Nerja Cave system (South of Spain) [PDF]

, 2018
Subterranean air in karst cavities has often low methane contents in comparison to atmosphere and so karst systems have been considered a sink of atmospheric methane. Methane-oxidizing bacteria have been hypothesized as responsible for CH4 depletion in
Benavente, José, Carrasco-Cantos, Francisco, Del Rosal, Yolanda, Etiope, Giuseppe, Liñán-Baena, Cristina, Moriñigo-Gutierrez, Miguel Angel, Ojeda, Lucía, Tapia, Silvana, Vadillo-Perez, Iñaki   +8 more
core  

Simulated elephant foraging alters tree root exudation rates: Species‐specific responses and implications for belowground carbon dynamics in tropical forests

PLANTS, PEOPLE, PLANET, EarlyView.
Asian elephants play crucial roles in ecosystem functioning, and their interactions with plants influence above‐ and belowground carbon cycling. We tested whether their mechanically destructive foraging triggers short‐term, stress‐induced shifts in tree root exudation, an underappreciated pathway linking herbivory to belowground carbon processes.
Pratibha Khatri, Bimal Sharma, Lisa Ong, Ahimsa Campos‐Arceiz   +3 more
wiley   +1 more source

Study on the development model of deep carbonate paleokarst reservoirs in the Tarim Basin

Carsologica Sinica
As a critical hydrocarbon-bearing basin in China, the Tarim Basin contains exceptionally abundant oil and gas resources within its Paleozoic marine carbonate formations, particularly in the deep subsurface where it exhibits significant exploration ...
Qingyu ZHANG, Guoquan NIE, Shaocong JI, Hongqi DONG, Jingrui LI, Junjie BA, Guochen MO, Meng ZHANG   +7 more
doaj   +1 more source

Host tree preference and performance of the Eurasian spruce bark beetle (Ips typographus) on Scots pine

Pest Management Science, EarlyView.
Ips typographus showed lower reproductive output in an occasional host (Pinus sylvestris) under laboratory conditions, and did not prefer its main host (Picea abies) over P. sylvestris in two‐choice bioassays. Abstract BACKGROUND The Eurasian spruce bark beetle, Ips typographus, is one of the most serious pests of Norway spruce (NS, Picea abies), with ...
Jana Gabriele Burchards, Dineshkumar Kandasamy, Martin Nils Andersson   +2 more
wiley   +1 more source

Large‐scale characterization of horizontal forest structure from remote sensing optical images

Remote Sensing in Ecology and Conservation, EarlyView.
Sub‐meter resolution remote sensing data and tree crown segmentation techniques hold promise in offering detailed information that can support the characterization of forest structure from a horizontal perspective, offering new insights in the tree crown structure at scale.
Xin Xu, Martin Brandt, Xiaowei Tong, Maurice Mugabowindekwe, Yuemin Yue, Sizhuo Li, Qiue Xu, Siyu Liu, Florian Reiner, Kelin Wang, Zhengchao Chen, Yongqing Bai, Rasmus Fensholt   +12 more
wiley   +1 more source