Presentation on theme: "And the effects of weathering,erosion, and deposition"— Presentation transcript:
1And the effects of weathering,erosion, and deposition Ecoregions of TexasAnd the effects of weathering,erosion, and deposition
2Factors Affecting Our Ecoregions Weathering – chemical and physical break down of rocks into sediment Erosion – the movement of sediment from one place to another Deposition – the placement of sediment after being carried from place of origin
3What is an ecoregion?A relatively large unit of land or water that is characterized by a distinctive climate, ecological features, and plant and animal communities
4Regions of Texas 1 – High and Rolling Plains 2 – Oak Woods and Prairies and Blackland Prairies3 – Pineywoods4 – Gulf Coast Prairies and Marshes and Coastal Sand Plains5 - South Texas Brush Country6 –Edward’s Plateau and Llano Uplift7 – Trans Pecos
5What is the topography of the ecosystems What is the topography of the ecosystems? What effect could that have on erosion and deposition?
6What effect do the rock types have on erosion and deposition?
7Which ecoregions have the most precipitation Which ecoregions have the most precipitation? What effect could that have on vegetation? On erosion and deposition?
8High and Rolling Plains “The Panhandle” Mostly flat and grassyMostly treelessOn a high, flat plateauThe eastern portion is not as flat and is brushyIncludes deep canyons carved by riversAverage regional rainfall inches a year
9Oak Woods & Prairies and Blackland Prairies Transition between plains of the Panhandle and the Pineywoods of East TexasPatches of woodland sprinkled throughout a grassland prairieGently rolling to hillyRich, fertile and black soilAverage regional rainfall – inches per year
10Pineywoods “East Texas” Primarily thick pine forestLarger forest extents into Louisiana, Arkansas, and OklahomaRolling terrain with wet bottomlandsSwamps are common especially in the “Big Thicket”Average regional rainfall inches per year
11Gulf Coast Prairies and Marshes and Coastal Sand Plains Bays, marshes, and barrier islandsEstuaries (salt and fresh water meet)Prairies and grasslands as you travel westHouston is a part of this ecoregionAverage regional rainfall inches per yearCan have extensive flooding from storms and hurricanes
12South Texas Brush Country Runs from edges of the Hill Country to the Lower Rio Grande ValleyMostly dry and covered with grasses and thorny brush such as mesquite and prickly pear cactiAverage regional rainfall inches per year
13Edward’s Plateau and Llano Uplift “The Hill Country” High flat land (plateau) eroded into hilly terrainMany springs and steep canyonsUnderground lakes in the Edward’s Aquifer areaCavesAverage regional rainfall inches per year
14Trans Pecos “West Texas” Region of extremesHot dry desert that is cool at nightMountains – occasionally snows in winterForests grow on slopesRio Grande River runs through forming a border between Texas and MexicoAverage regional rainfall 8-20 inches per year