Drought signal in the tree-rings of three conifers in Northern Pakistan

Authors: Sanjaya Bhandari*, Indiana State University - EES, James H Speer, Indiana State University, Moinuddin Ahmed, Dr. Moinuddin Ahmed Research Laboratory of Dendrochronology and Plant Ecology, Federal Urdu University of Arts, Science and Technology Karachi, Pakistan, Adam Khan, Dr. Moinuddin Ahmed Research Laboratory of Dendrochronology and Plant Ecology, Federal Urdu University of Arts, Science and Technology Karachi, Pakistan
Topics: Environment, Earth Science, Asia
Keywords: Hindu-Kush Himalayas , Pinus wallichiana, Picea smithiana, Abies pindrow, scPDSI
Session Type: Poster
Day: 4/5/2019
Start / End Time: 3:05 PM / 4:45 PM
Room: Lincoln 2, Marriott, Exhibition Level
Presentation File: No File Uploaded


The high-altitude forests in Hindu-Kush Himalayas region are vulnerable to climate change. We can apply dendrochronological technique to understand their sensitivity towards climate (temperature, precipitation, and drought). The high mountain of Pakistan offers diversity of trees which can be used in dendrochronological analysis to understand their response towards climate. In this present study we have collected tree-ring samples from Pinus wallichiana, Picea smithiana, and Abies pindrow from three different sites of northern Pakistan. A 611year (AD 1406 to 2015), 539 years (AD 1478-2016), and 307 years (AD 1710-2016) long tree-ring width chronology of Pinus wallichiana, Picea smithiana, and Abies pindrow respectively have been developed from living trees. All three chronologies showed unprecedented growth since AD 1980. The increase of moisture present in recent decades in these area might have enhanced the growth of trees. The ring-width chronologies of these showed strong link between scPDSI rather than precipitation and temperature. Our tree-growth analysis shows that the growth of these species showed significance positive relation with annual scPDSI. As all of our samples were collected from semi-arid zone, high temperature and less precipitation increases the soil moisture deficiency which limits the growth of trees in these drier area.


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