[an error occurred while processing this directive] [an error occurred while processing this directive]
[an error occurred while processing this directive]Soil respiration in a natural forest and a plantation during a dry period in the Philippines
Received date: 2022-12-14
Accepted date: 2023-06-06
Online published: 2024-10-16
Copyright
Renato S. Pacaldo , Mirac Aydin . [J]. 林业研究(英文版), 2023 , 34(6) : 1975 -1983 . DOI: 10.1007/s11676-023-01636-z
Climate change is forecast to increase the frequency of extreme hot temperatures and dryer days and is anticipated to have profound impacts on the global carbon budget. Droughts are expected to alter soil respiration (Rs) rates, but the scarcity of data preclude a reliable estimate of this response and its future trajectory. A field experiment using an automated soil respiration machinery (LI-8100A) was conducted in a natural forest and a plantation during a dry period in the Philippines, with the goal of quantifying Rs rates and their relationship with soil temperature and moisture, and air temperature. The natural forest (5.81 µmol m−2 s−1) exhibited significantly higher Rs rates (p < 0.0001) compared with the plantation (1.82 µmol m−2 s−1) and control (3.23 µmol m−2 s−1). Rs rates showed significant negative relationships with air (− 0.71) and soil temperatures (− 0.62), indicating that as temperatures increase, the Rs rates decrease. In contrast, the Rs rates exhibited a significant positive relationship with soil moisture (0.65). Although the low Rs rates in the plantation and high Rs rates in the natural forest are indicators of sensitivities of these two types of tropical forests to warm, dry soil, this observation is only conclusive during the dry period, but not necessarily during wet periods. Further studies are needed to determine the trend of Rs rates during wet periods, considering different site conditions and types of vegetation.
Key words: Climate change; Carbon; Air and soil temperatures; Soil moisture; Tropical stands
1 |
|
2 |
|
3 |
|
4 |
|
5 |
|
6 |
|
7 |
|
8 |
Braatz BV, Doorn M (Eds) (2005) Managing the national greenhouse gas inventory process. United Nations Development Programme and the Global Environmental Facility, New York, NY
|
9 |
|
10 |
|
11 |
|
12 |
|
13 |
|
14 |
|
15 |
|
16 |
DENR-FMB (2020) Philippine Forestry Statistics 2020. DENR-FMB, Diliman Quezon City, Philippines. https://forestry.denr.gov.ph/index.php/statistics/philippines-forestry-statistics. Accessed 30 Nov 2022
|
17 |
|
18 |
|
19 |
|
20 |
DOST-PAGASA (2011) Climate Change in the Philippines. Climatology and Agrometeorology Division, Diliman, Quezon City, Philippines. https://pubfiles.pagasa.dost.gov.ph/iaas/ClimateChange_in_the_Philippines_MDGF_Report_2011.pdf. Accessed 11 April 2022
|
21 |
FAO and UNEP (2020) The State of the World’s Forests 2020. Forests, biodiversity and people. Rome. https://www.fao.org/3/ca8642en/online/ca8642en.html. Accessed 15 Nov 2022
|
22 |
|
23 |
|
24 |
|
25 |
|
26 |
Houghton RA (2005) Tropical deforestation as a source of greenhouse gas emissions. In: Moutinho P, Schwartzman S (eds) Tropical Deforestation and Climate Change, pp13–21
|
27 |
|
28 |
IPCC (2001) Climate Change 2001: The scientific basis (eds Houghton JT et al). Cambridge University Press, Cambridge
|
29 |
|
30 |
|
31 |
|
32 |
Koskela J, Nygen, P, Berninger F, Luukkanen O (2000) Implications of the Kyoto Protocol for tropical forest management and land use: prospects and pitfalls. In: University of Helsinki Tropical Forestry Reports (Vol. 22). University of Helsinki, Department of Forest Ecology
|
33 |
|
34 |
Lasco RD, Pulhin FB, Cruz RVO, Pulhin JM, Roy SSN (2005) Carbon budgets of terrestrial ecosystems in Pantabangan-Caranglan watershed. AIACC Working Paper No. 10. https://www.start.org/Projects/AIACC_Project/working_papers/Working%20Papers/AIACC_WP_No010.pdf. Accessed 23 Oct 2022
|
35 |
|
36 |
|
37 |
|
38 |
Noordwijk MV, Lawson G, Hairiah K, Wilson J (2015) Root distribution of trees and crops: competition and/or complementarity. In: Tree-crop interactions: agroforestry in a changing climate. Wallingford UK, CAB, p 221–257
|
39 |
|
40 |
|
41 |
|
42 |
|
43 |
|
44 |
|
45 |
|
46 |
|
47 |
|
48 |
|
49 |
|
50 |
Smil V (1999) The Carbon Cycle. The Circles of Life, 4th edn. Mc GrawHill Inc, p 45–70
|
51 |
|
52 |
|
53 |
|
54 |
|
/
〈 |
|
〉 |