Identifying and Separating Pandora Moth Outbreaks and Climate from A 1500-Year Ponderosa Pine Chronology from Central Oregon

IF 1.1 4区农林科学 Q3 FORESTRY

Tree-Ring Research Pub Date : 2017-08-22 DOI:10.3959/1536-1098-73.2.113

P. Clark, J. Speer, L. J. Winship

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引用次数: 9

Abstract

Abstract We reconstruct pandora moth (Coloradia pandora Blake) outbreaks and climate from a 1572-year (435–2006 CE) ponderosa pine (Pinus ponderosa Dougl. ex Laws.) chronology from a lava flow in central Oregon. We took samples from 128 living trees and remnant logs and crossdated the samples using skeleton plots and COFECHA for quality control. After cutting out and removing those time periods from the chronology during which insects become the main limiting factor to growth, we examine the response of tree rings to climate. Evidence of species longevity (up to 877 years), presence of periodic pandora moth defoliations (13 total), and a significant relationship with the Palmer Drought Severity Index were observed (R2 = 0.34, p < 0.001). Suppressions related to pandora moth outbreaks were recorded back to 618 CE, with a mean return interval of 104 years. Previous-fall to current-spring PDSI was reconstructed over 1376 years (630–2006 CE), where the most prolonged drought periods were 1136–1166 CE and the Dust Bowl 1924–1941. Our research documents longevity of ponderosa pine, resilience in the presence of multiple disturbances, and demonstrates a technique to separate insect outbreak signals from climate reconstructions in long chronologies while embracing the entire signal available in tree rings.

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从俄勒冈中部1500年黄松年表中识别和分离潘多拉蛾爆发和气候

摘要本文从1572年(435-2006年)黄松(Pinus ponderosa Dougl)中重建了潘朵拉蛾(Coloradia pandora Blake)的爆发和气候。俄勒冈州中部熔岩流的年代学。我们采集了128棵活树和残木样本，并利用骨架图和COFECHA对样本进行了交叉年代测定，以进行质量控制。在从年表中剔除昆虫成为主要生长限制因素的时间段后，我们研究了树木年轮对气候的响应。物种寿命(可达877年)，存在周期性潘多拉蛾落叶(共13次)，并与Palmer干旱严重指数显著相关(R2 = 0.34, p < 0.001)。与潘朵拉蛾爆发有关的抑制可追溯到公元618年，平均回归间隔为104年。PDSI重建了1376年(公元630-2006年)，其中最长的干旱期是公元1136-1166年和1924-1941年的沙尘暴。我们的研究记录了黄松的寿命，在多种干扰存在下的恢复能力，并展示了一种技术，可以将昆虫爆发信号从长年表的气候重建中分离出来，同时包含树木年轮中可用的整个信号。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Tree-Ring Research 农林科学-林学

CiteScore

2.40

自引率

12.50%

发文量

审稿时长

>36 weeks

期刊介绍： Tree-Ring Research (TRR) is devoted to papers dealing with the growth rings of trees and the applications of tree-ring research in a wide variety of fields, including but not limited to archaeology, geology, ecology, hydrology, climatology, forestry, and botany. Papers involving research results, new techniques of data acquisition or analysis, and regional or subject-oriented reviews or syntheses are considered for publication. Scientific papers usually fall into two main categories. Articles should not exceed 5000 words, or approximately 20 double-spaced typewritten pages, including tables, references, and an abstract of 200 words or fewer. All manuscripts submitted as Articles are reviewed by at least two referees. Research Reports, which are usually reviewed by at least one outside referee, should not exceed 1500 words or include more than two figures. Research Reports address technical developments, describe well-documented but preliminary research results, or present findings for which the Article format is not appropriate. Book or monograph Reviews of 500 words or less are also considered. Other categories of papers are occasionally published. All papers are published only in English. Abstracts of the Articles or Reports may be printed in other languages if supplied by the author(s) with English translations.