Processes Affecting Carbon Storage in the Forest Floor and in Downed Woody Debris
نویسندگان
چکیده
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ... .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ,135 The Forest Floor Defined and Measured ....................................................................................... 136 Processes Governing Forest-Floor C Dynamics ............ ...... .... ............................... .. .. .. .. .. ............. 137 Early-Stage Decomposition ........ .... .. .. ..................................... ................................. .. .. .... .... 138 Late-Stage Decomposition .............. .. .. ......................... ........ ................................. .... ......,.... 139 Completeness of Decay ............................................................................................ 139 Leaching of Dissolved Organics to Mineral Soil Horizons ................................................ 140 Natural Mixing of Forest-Floor Material into Mineral Soil ................................................ 141 Downed Woody Debris .......... .... ...... ................. . . . .......................... . . ......................... . 1 4 2 Inputs and Pool Sizes ............ ............... .. .... ......................... ...... .. .. .... ........................... ........ 142 Losses from Woody Detrital Pools ...................................................................................... 143 Disturbance, Management, and Scaling up to Landscapes ....................................................... 145 Disturbance and Subsequent Dynamics in Forest-Floor C Pools ....................................... 145 Scaling to Landscapes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ., ... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .I47 Global Change and Ecosystem-Level Feedbacks .......................................................................... 147 Summary and Conclusion ....... .. .. .. ......... .... ......... .... . .......................................... . ........ . 150 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15 1
منابع مشابه
Forest structure and downed woody debris in boreal, temperate, and tropical forest fragments.
Forest fragmentation affects the heterogeneity of accumulated fuels by increasing the diversity of forest types and by increasing forest edges. This heterogeneity has implications in how we manage fuels, fire, and forests. Understanding the relative importance of fragmentation on woody biomass within a single climatic regime, and along climatic gradients, will improve our ability to manage fore...
متن کاملبرآورد ضایعات چوبی در جنگل فندقلوی اردبیل با استفاده از نمونه برداری خطی
Woody Debris is structural and functional part on forest ecosystems and plays a key role in nutrition circulation and carbon storage in long time, tree regeneration and biodiversity conservation. For this reason, studies about investigation and determination of the amount, the method of measurement and spatial distribution of coarse woody are very important. To correct planning about coarse woo...
متن کاملQuantifying carbon stores and decomposition in dead wood: A review
The amount and dynamics of forest dead wood (both standing and downed) has been quantified by a variety of approaches throughout the forest science and ecology literature. Differences in the sampling and quantification of dead wood can lead to differences in our understanding of forests and their role in the sequestration and emissions of CO2, as well as in developing appropriate strategies for...
متن کاملField Results for Line Intersect Distance Sampling of Coarse Woody Debris
A growing recognition of the importance of downed woody materials in forest ecosystem processes and global carbon budgets has sharpened the need for efficient sampling strategies that target this resource. Often the aggregate volume, biomass, or carbon content of the downed wood is of primary interest, making recently developed probability proportional-to-volume designs such as line intersect d...
متن کاملStructure and composition of streamside management zones following reproduction cutting in shortleaf pine stands
Streamside management zones (SMZs) in the Ouachita Mountains of Arkansas and Oklahoma are frequently established along headwater ephemeral and intermittent streams to protect water quality, provide wildlife habitat, and increase landscape diversity. To better understand the function of these riparian forest corridors, we characterized the tree density and composition, forest floor mass, and dow...
متن کامل