Dynamic Microclimate Boundaries across a Sharp Tropical Rainforest–Clearing Edge
| Autor: | Yeung Lam, William J. Kaiser, Mark Hansen, Eric Yuen, Philip W. Rundel, Eric Graham |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
010504 meteorology & atmospheric sciences Science piece-wise regression Community structure Microclimate robotic sampling Vegetation Atmospheric sciences 010603 evolutionary biology 01 natural sciences Spatial ecology General Earth and Planetary Sciences Environmental science forest edge Shortwave radiation Transect ground truth Shortwave microclimate 0105 earth and related environmental sciences Tropical rainforest |
| Zdroj: | Remote Sensing, Vol 13, Iss 1646, p 1646 (2021) |
| ISSN: | 2072-4292 |
| DOI: | 10.3390/rs13091646 |
| Popis: | As landscapes become increasingly fragmented, research into impacts from disturbance and how edges affect vegetation and community structure has become more important. Descriptive studies on how microclimate changes across sharp transition zones have long existed in the literature and recently more attention has been focused on understanding the dynamic patterns of microclimate associated with forest edges. Increasing concern about forest fragmentation has led to new technologies for modeling forest microclimates. However, forest boundaries pose important challenges to not only microclimate modeling but also sampling regimes in order to capture the diurnal and seasonal dynamic aspects of microclimate along forest edges. We measured microclimatic variables across a sharp boundary from a clearing into primary lowland tropical rainforest at La Selva Biological Station in Costa Rica. Dynamic changes in diurnal microclimate were measured along three replicated transects, approximately 30 m in length with data collected every 1 m continuously at 30 min intervals for 24 h with a mobile sensor platform supported by a cable infrastructure. We found that a first-order polynomial fit using piece-wise regression provided the most consistent estimation of the forest edge, relative to the visual edge, although we found no “best” sensing parameter as all measurements varied. Edge location estimates based on daytime net shortwave radiation had less difference from the visual edge than other shortwave measurements, but estimates made throughout the day with downward-facing or net infrared radiation sensors were more consistent and closer to the visual edge than any other measurement. This research contributes to the relatively small number of studies that have directly measured diurnal temporal and spatial patterns of microclimate variation across forest edges and demonstrates the use of a flexible mobile platform that enables repeated, high-resolution measurements of gradients of microclimate. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
| Nepřihlášeným uživatelům se plný text nezobrazuje | K zobrazení výsledku je třeba se přihlásit. |