Principles of Forest Ecology and Management. Forensic Forestry Reading the Land. Jonathan Kays University of Maryland Extension

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1 Principles of Forest Ecology and Management or Forensic Forestry Reading the Land Jonathan Kays University of Maryland Extension

2 Where Do We Start? Think Like A Plant Act Like A Plant

3 Thinking and Acting Like a Plant What is your favorite plant? Where does it grow? How do you describe that place? What is important?

4 What Does a Plant Need? Light Water Nutrients

5 Principles of Forest Ecology Site Quality Shade Tolerance Forest Succession Plant Competition Stand Development Role of Fire, Insect & Disease, and Herbivory,

6 Site The environment or system supporting a forest, which influences trees and plants growing there. The sum of Soil, Topography, Climate, Plants, and Animals

7 Forest Succession on a Site Predictable changes in plant communities as the competing organisms respond to and modify the environment. These changes will vary depending on the site.

8 Site is More Important than the Vegetation It is more fixed It is more stable It is more easily defined Reflects disturbance Strip mine (extreme) Pasture (subtle) Harvesting (either)

9 Appalachian Maryland Physiographic Regions or Sites Plateau Ridge& Valley Great Valley Blue Ridge Piedmont Coastal Plain

10 Garrett County Alleghany Plateau

11 Allegany County - Ridge and Valley

12 Piedmont Region

13 Coastal Plain Southern Maryland

14 Coastal Plain - Eastern Shore

15 Soil profile How does soil develop or form? From the bottom or the top?

17 Root Mat that holds soil in place Plow Layer

18 Soil Texture Tree Height Sand Clay Heavy Loam Loam Clay

19 Wetland soils contain organic material, exist with little oxygen, and have developed specialized ecosystems compared to upland areas.

20 Consider soils when selecting tree species to plant. Black walnut requires well-drained soils to thrive. This site is poorly drained so the trees grew poorly and many died.

21 Where are most of the tree roots? Most tree roots are found within the top 12 inches of soil

22 You are here! The old Online Soil Survey

23 Faster recycling of nutrients in hardwood forests compared to pine. WHY?

24 Best Management Practices protects the root mat

25 Slope Position Are trees larger on the upper or lower slope?

26 Climate, soil, available water, and nutrients all affect how well a tree grows. If minimum requirements are not met, a tree may not grow in a given area.

27 Oaks are better adapted to dry and shallow hilltop soils, while yellowpoplar trees are found on more fertile lower slopes

28 Certain trees adapt to special conditions

29 Site Indicator Species

30 Aspect Direction the slope is facing north A B west east south

31 Solar Radiation What would the line look like for a south, north, and east facing slope? 6 a.m. Noon 6 p.m

32 South-facing Slope North-facing Slope Effect of Aspect on Site Quality

33 Quantity of wood produced from an acre of forest depends upon the site quality and is similar to farm crops.

34 A B Site Index brings it all together! * By measuring total height and age * You get site index, the height of a tree at 50 years old * The taller the tree, the more productive the site.

35 Principles of Forest Ecology Site Quality Shade Tolerance Forest Succession Plant Competition Stand Development Role of Fire, Insect & Disease, and Herbivory,

36 Shade Tolerance is the ability of a plant to grow in the shade Intolerant Species - intolerant of shade and must have full sunlight to grow Tolerant Species - tolerant of shade does not require full sunlight to grow Intermediate tolerance - can grow in partial sunlight or shade

37 Tolerance, Sunlight, Growth D B H 0% 50% 100% Percentage Sunlight

40 Intermediate tolerance trees that can establish themselves in the understory, but require full sunlight to mature -- Oak in this example

41 Tolerant species

42 Tolerance of Common Forest Trees Intolerant Intermediate Tolerant Full Sun Full Shade Virginia pine White pine Hemlock Loblolly pine Hickories Beech Yellow-poplar Yellow & bl birch Sugar maple Scarlet & black oak White & red oak Red maple Black walnut Chestnut oak Silver maple Green ash Red oak Basswood Red cedar White ash American holly Grey birch

43 Principles of Forest Ecology Site Quality Shade Tolerance Forest Succession Plant Competition Stand Development Role of Fire, Insect & Disease, and Herbivory,

44 Forest Succession Predictable changes in plant communities as the competing organisms respond to and modify the environment. Principle: All natural areas change over time, whether or not you do anything to them.

46 Stage 1 Herbaceous species

47 Stage 2 - Old Field

48 Stage 2 - Old Field of red cedar and goldenrod. It may be beneficial to maintain old field habitats by cutting down invading trees, which can maintain a diversity of habitats on the property.

49 Honeysuckle Grapevine Invasive and natural species can take over Kudzu

50 Old field red cedar being overtopped by shade intolerant tree species (yellow-poplar in this case).

51 Stage 3 Tree crowns close, sunlight disappears, resulting in dieback of ground vegetation. Poor wildlife value for this stage of succession.

52 Stage 4

53 Stage 5 Old Growth

54 Early Successional Species Vary by Region

55 Forest succession is the progression of plant communities that begins with shade intolerant plants and ends up with shade tolerant plants.

56 Virginia Pine early successional forest common on poor soils.

57 Virginia pine forest that is dying. Beech trees (a late successional species) is established in the understory and will form the new forest.

58 Tree Planting-- Pushing succession ahead

59 Forest Harvesting: Effect on Succession?

60 Forest succession & wildlife habitat

61 Principles of Forest Ecology Site Quality Shade Tolerance Forest Succession Plant Competition Stand Development Role of Fire, Insect & Disease, and Herbivory,

62 What Do Plants Compete For? Light Water Nutrients

63 Are these trees different ages?

64 Is tree size a reliable indicator of tree age? Why?

65 Tree is a factory... Leaves use sun and water to produce food... More leaves More food More diameter growth...

66 The dominance of a tree refers to the position of its crown relative to other trees in the canopy. In even-aged forests, the more dominant trees have won the competition for light.

67 Can you label the dominance of the trees in this picture?

68 Forest Thinning - improve growth & species composition, not regeneration

69 Leaves use sun and water to produce food years - More leaves - More food - More diameter growth years

70 Live crown ratio (LCR) is the ratio of the foliage canopy to the total height of the tree.

71 Epicormic Branching As buds under bark are exposed to sunlight, they grow and form new branches on the tree bole and can reduce quality. Do not open the forest canopy too much.

72 This forest was harvested using sound practices. It would be hard to tell much happened here after a few years.

73 The use of poor harvest practices removes dominant and best trees and leaves the rest. They go by the names of diameter-limit cutting, selection harvest and high-grading. This amounts to starting over.

74 Principles of Forest Ecology Site Quality Shade Tolerance Forest Succession Plant Competition Stand Development Role of Fire, Insect & Disease, and Herbivory,

75 Regeneration is the key: Different species have different regeneration strategies

76 Some species like yellow-poplar, ash and maple need bare soil to germinate seeds

77 Heavy seeded species: * Oak * Hickory * Walnut

78 Stump sprouts from cut hardwood stumps are the most vigorous source of hardwood forest regeneration

79 If stumps are cut low, sprouts from the root collar will grow into quality trees (right).

80 Stand development: Year 1: 10,000 stems/ac Year 15: 1,000 stems/ac

82 Stand Development A function primarily of site quality Past history current practices (grazing, for example) species composition A photographic history from the Allegheny Plateau in Pennsylvania ( )

83 1927

84 1928

85 1937

86 1947

87 1958

88 1968

89 1978

90 1998

91 Development of vertical stratification as trees die, holes are filled, others seed in.

92 Forests are resilient

93 60 years later

94 Principles of Forest Ecology Site Quality Shade Tolerance Forest Succession Plant Competition Stand Development Role of Fire, Insect & Disease, and Herbivory,

95 Fire releases nutrients, renews, and favors certain tree species

96 Chestnut Blight changed the forest in the span of a few years in the late 1920 s.

97 Emerald Ash Borer new threat to ash trees Gypsy moths continue to be a periodic problem.

98 Major disturbances, such as hurricanes, tornadoes, and wind storms.

99 Other Disturbances Southern pine beetle Invasive species Deer browsing

processes No seedling regeneration in the majority of

100 City of Baltimore, Reservoir Forests Example: intense deer browse leads to the disruption of ecological processes No seedling regeneration in the majority of understory plots Prettyboy.. 84% Liberty.. 74% Loch Raven.. 63%

101 Deer overabundance negatively impacts forest regeneration and wildlife habitat for other species. Forest birds that used to nest in the ground vegetation are no longer found.

102 Principles of Forest Ecology Site Quality Shade Tolerance Forest Succession Plant Competition Stand Development Role of Fire, Insect & Disease, and Herbivory, How do we put all this together to make recommendations for management activities?

103 What History Are You Writing?

Forensic Forestry Reading the Land

Principles of Forest Ecology and Management or Forensic Forestry Reading the Land Jonathan Kays University of Maryland Extension Where Do We Start? Think Like A Plant Act Like A Plant Thinking and Acting