Abstract

An aeropalynological study was conducted within Yangmingshan National Park, Taiwan. At the study site (Hsiao-Kuan-Yin), a Burkard seven-day volumetric pollen trap was used to collect samples from April 1997 to March 1998. Over this period, a total of 64 taxa belonging to 46 families and 54 genera were identified in the pollen assemblage. The decreasing abundance of pollen and spores was in the following sequence: Gramineae (23.1%), Urticaceae (17.2%), Trema (15.3%), Ardisia (7.0%), Broussonetia (5.6%), Cyathea (4.5%), Piper (3.4%), Mallotus (2.9%), other Euphorbiaceae (2.5%), Humulus (1.4%) and Pinus (1.2%). Two major pollen seasons, from March to May and in October, were dominated by arboreal pollen and Gramineae pollen, respectively, while only a small amount of pollen and fern spores were collected from November to February. The major species of pollen also varied by season: Trema dominated in April and May, Ardisia in June, Cyathea in July and August, Mallotus paniculatus in September, Gramineae in October, and Urticaceae and Broussonetia in March. A pollen calendar was constructed to illustrate this seasonal variation in the quantitative and qualitative characteristics of airborne pollen and spores.

中文摘要

本研究於陽明山國家公園小觀音置一空中孢粉收集器，收集空中花粉和蕨類孢子，以光學顯微鏡觀察並鑑定孢粉之種類及數量，完成1997年四月至1998年三月空中孢粉之鑑定。一年來出現的孢粉種類共 46 科 54 屬，其中禾本科的花粉佔全年總量的 23.1 %最為優勢，次為蕁麻科佔 17.2%，山黃麻屬佔 15.3 %，紫金牛屬佔 7.0 %，構樹屬佔5.6 % ，桫欏屬佔4.5%，胡椒屬佔3.4%，野桐屬佔2.9%，其餘的大戟科佔2.5%，葎草屬佔1.4%，松屬佔1.2%。陽明山地區全年有二個明顯的主要花季 : 一為3月至5月，豐富的孢粉量由各樹種花粉構成；另一為10月，主要由禾本科花粉組成。1997年四月和五月以山黃麻屬的花粉佔優勢，六月為紫金牛屬，七月和八月為桫欏屬，九月為白匏子，十月為禾本科，十一月和十二月空中孢粉量非常少；1998年一月和二月開始有新的樹種花粉出現，但量仍然很少，三月以蕁麻科和構樹屬的花粉佔優勢。本研究建立了陽明山國家公園的孢粉曆，提供了不同季節中空中孢粉種類和量的變化。

Keyword: Aeropalynology, Pollen calendar, Pollen dispersal, Yangmingshan National Park.