Plant Biology

Leaf Characteristics

Kinds: scale-like, broad leaf, needle-like

Arrangement: opposite, alternate, whorled, rosette

Forms: simple, compound, pinnate, palmate

Margin: entire, serrate, toothed, lobed

Shapes: linear, lanceolate, ovate/oblong, cordate, elliptic

Tree Examples

Virtual Tree ID Key

New Paltz High School Plant List

Activity: Out of your Tree Play

Ecological Succession

Ecological succession is the process by which organisms occupy a site and gradually change environmental conditions by creating soil, shade, shelter, or increasing humidity

• Primary Succession- occurs when a community begins to develop on a site previously ____________ by living organisms ex. island, new volcanic flow
  pioneer species- in primary succession, the species that _______ colonizes the new area
  -often microbes, mosses and lichens   

• Secondary Succession- occurs when an ___________ community is disrupted and a new one subsequently ___________ at the site
  -disruption may be caused by natural catastrophe, human activity
  ____________ community- in either primary or secondary succession, when a community develops that resists further change
                   
• Aquatic Succession-process or succession taking place in a body of __________

Ecological Development- environmental modification by organisms which lead to habitats of greater and greater complexity.

Activity: Time Lapse