1 / 18

Stages Of Succession in a Xerosere

Stages Of Succession in a Xerosere. Asra, Christine, Haruka , Nicole and Sabrina. Stage 1. Bare, inorganic a-biotic surface becomes available for colonization Pioneers: typically r-selected species. Stage 2. Stage 2 colonization: Pioneers colonize the area first.

fordon
Download Presentation

Stages Of Succession in a Xerosere

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Stages Of Succession in a Xerosere Asra, Christine, Haruka, Nicole and Sabrina

  2. Stage 1 • Bare, inorganic a-biotic surface becomes available for colonization • Pioneers: typically r-selected species

  3. Stage 2 • Stage 2 colonization: Pioneers colonize the area first. • Simple soil starts from windblown dust and mineral particles.

  4. Stage 3 • Stage 3 establishment: Species diversity increases. Invertebrate species begin to visit and live in the soil, increasing organic material content and water-holding capacity. • Weathering enriches soil with nutrients.

  5. Stage 4 • Stage 4 competition: Microclimate continues to change as new species colonize. Larger plants increase cover and provide shelter, enabling K-selected species to become established. • Temperatures, sun and wind are less extreme • Earlier pioneer r-species are unable to compete with K-species for space, nutrients or light and are lost from the community. • There is a decrease in r-species due to competition because of improved conditions for k-species.

  6. Stage 5 • Stage 5 stabilization: • Complex food webs develop. • Fewer new species • K-species have longer life cycles and delayed reproduction which attributes to stabilization.

  7. Stage 6 • Climax: • Stable community/state of dynamic equilibrium • Climatic climax community: • Maximum possible development reached that environmental conditions allow.

  8. Amount Of Mineral Content • As the new stages occur, the amount of organisms increase which in turn increase the amount of mineral content in the environment.

  9. Speed of Mineral Cycling The storage spaces at the beginning of succession are smaller, so mineral cycling is generally faster. As the storage spaces become larger, the minerals take longer to cycle through, so the speed of cycling decreases.

  10. Net Productivity Stage 0- Starts with no net productivity because there is only bare rock Stage 1- As the number of organisms increase, there is an increase on net productivity Stage 3- As the number of organisms increase even more, more respiration occurs, so the net productivity decreases, because more energy is being respired away. Stage 5- There is a limit to the number of organisms able to live in one ecosystem, thus the net productivity stabilizes after reaching an optimum number of organisms, thus constant respiration

  11. Gross Productivity Stage 0- Starts with no gross productivity because there is only bare rock Stage 1- As the number of organisms increase, there is an increase on gross productivity Stage 5- The ecosystem has reached a point of saturation in gross productivity, and productivity does not increase nor decrease significantly over time

  12. Diversity • Starts with no diversity because there is only bare rock • The diversity of R-Strategists increase quicker than the diversity of K-Strategists • As the diversity of r-strategists increase, there is also an increase in the diversity of K-Strategists • The diversity of K-Strategists increase, and start to consume the R-Strategists, thus lessening the diversity of the R-Strategists • Levels out eventually, as everything stablizes

  13. Hydrosere AC, Chris, Tae Wan, Lucas, Michael, Ryuya, Anil and Fausti

  14. Bare Bare, inorganic Surface: It is a mostly lifeless environment. The deep waters created by the lack of sediments cause a lack of light in the environment, which leads to no rooted plants being present. As plants photosynthesize to create oxygen needed for maintaining life, this environment can not support many organisms. The soil is nutrient poor, leading to less life being present. Any life present is mostly r-selected species, which have short life cycles, small size, rapid growth, and the production of many off springs. IN the case of this environment they are mostly micro-organisms and phytoplankton.

  15. Stage 1 Stage 1: Phytoplankton stage Occurs when dirt and soil sediments settle on the bottom surface – making it possible for simple pioneers to colonize and prosper. These sediments come from spores that are carried by the air to the body of water.

  16. Stage 2&3 Seral Stage 2&3: This is a stage where vegetation in the deep freshwater. Grass and weeds start to grow, which starts depositing sediments on the bottom floor of the deep freshwater. As the hydrosere’s stages approach stage 3, weeds and grasses start to grow more rapidly and it results to more silt stacking up on top of each other.

  17. Seral Stage 4: Stabilization Stage 4 Fewer species inhabit as plants that have et their grown grow out as new species get pushed out. Complex food webs develop as K-selected species inhabit the waters.

  18. Seral Climax Stage 5 Final Seral stage or climax community which is at a steady state Dynamic equilibrium It is the maximum possible development a community can reach under prevailing environmental conditions. It is called a climatic climax community

More Related