花楸(Sorbus aucuparia)繁殖力种内变异的驱动因素

IF 2.6 2区 农林科学 Q1 FORESTRY
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引用次数: 0

摘要

摘要 了解个体树木繁殖力的变化对于预测种群动态和生态系统功能至关重要。然而,由于不同树木和不同年份的种子产量差异很大,因此估算树木的繁殖力具有挑战性,这就需要进行具有后勤挑战性的长期监测。本研究旨在利用 167 棵树 22 年的果实计数数据集调查影响花楸(Sorbus aucuparia)繁殖力的因素。我们研究了繁殖力与内在因素(DBH、高度和叶片养分浓度)和外在因素(土壤养分、光照和邻近拥挤度)之间的关系。我们的研究结果表明,胸径(DBH)比高度更能解释繁殖力的变化。用胸径(DBH)计算树的大小后,光照对繁殖力的正面影响最大,是限制楸树繁殖力的主要因素。同时,与同种植物的邻近拥挤指数也与繁殖力呈显著负相关,这表明楸树之间存在授粉竞争。我们的研究结果有助于更好地理解种子生产生态学,并可为旨在增加果实供应的管理和保护工作提供信息,无论是对植物种群还是果实消费者而言。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Drivers of intraspecific variation in fecundity in rowan (Sorbus aucuparia)

Abstract

Understanding the variation in fecundity, the reproductive capacity of individual trees, is crucial for predicting population dynamics and ecosystem functioning. However, estimating tree fecundity is challenging due to the large variation in seed production observed between trees and across years that necessitates logistically challenging long-term monitoring. This study aimed to investigate the factors influencing fecundity in rowan trees (Sorbus aucuparia) using a 22-year fruit-count dataset in 167 individual trees. We examined the relationship between fecundity and intrinsic (DBH, height, and leaf nutrient concentration) and extrinsic factors (soil nutrients, light availability, and neighborhood crowding). Our findings revealed that diameter at breast height (DBH) better explained variation in fecundity than height. After accounting for tree size using DBH, light availability had the strongest, positive effect on fecundity and was the major limiting factor for rowan’s fecundity. At the same time, neighborhood crowding index with conspecifics also showed significant, but negative correlation with fecundity, suggesting competition for pollinators among rowan trees. Our findings contribute to a better understanding of seed production ecology and can inform management and conservation efforts that aim for increased fruit supply, either for plant populations or fruit consumers.

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来源期刊
CiteScore
5.10
自引率
3.60%
发文量
77
审稿时长
6-16 weeks
期刊介绍: The European Journal of Forest Research focuses on publishing innovative results of empirical or model-oriented studies which contribute to the development of broad principles underlying forest ecosystems, their functions and services. Papers which exclusively report methods, models, techniques or case studies are beyond the scope of the journal, while papers on studies at the molecular or cellular level will be considered where they address the relevance of their results to the understanding of ecosystem structure and function. Papers relating to forest operations and forest engineering will be considered if they are tailored within a forest ecosystem context.
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