Plant Ecology Exams Solutions GG

PlantEcology Exams Solutions GG

PlantEcology Exams Solutions

Specieslabeled 2, that has no color would have high diversitycharacteristics. This is because there are no nectarines within ithowever, the plant still has seeds that are naturally fertilized anddeveloped. There are a few other well-known characteristics that maybe used to identify a high diversity community. These traits includethe absence or presence of nectarines in the plant and on whether theflowers can still self-pollinate or not. The high diversity can alsobe characterized by having more species with different flower colorsso as to visibly show the variations of various species in theecosystem. This creates a direct relationship between diversity andbalance of the eco-system (Gurevitch, Scheiner, &amp Fox, 2006). Forinstance, the more diverse species are, the more balanced anecosystem become.

Themost common color is yellow- which interestingly happens to be themost dominant color. The species are not different since they alsocontain nectarines in their structure. Furthermore, the flowers havea high possibility of being fertilized when they are bagged asopposed to when they are not. Having the yellow color being the mostcommon, in this case, would mean that pollinators will have highpopulation especially in the form of animal dispensers. Therefore, asnature demands it within the entire community under the paradigm ofsurvival for the fittest, competition would be higher with theinadequate supply of the most favorable colored flowers (Gurevitch,Scheiner, &amp Fox, 2006).

Thedata on the species 1 presents a case that they have nectarines. Theinformation presented indicate that 90 percentage of the ovalsspecies were developed. This depicts that pollination occurssuccessfully when the flowers can pollinate freely. The presence ofnectarines is an exceptional advantage to the successful pollinationof the flowers. The species 2 has no color, and the data shows thatthe number of successfully pollinated ovals is the lowest at 65percent of species studied. The species 3, on the other hand, has apurple color, and its structure includes nectarines. This ensuresthat 70% of the ovals are pollinated and fertilized.

Finally,the seed set data for the bagged flowers would mean that the floweris covered and therefore cross-pollination is likely not to occur dueto this physical inhibition. However, self-pollination could occur asobserved in the species 3. The un-bagged flowers naturally havehigher chances of cross-pollination occurring. The species with thegreatest amount of inbreeding are species 3 whereas the species withthe greatest amount of inbreeding are species 1. Inbreeding bydefinition refers to the same plant`s pollen grains fusing andfertilizing the very same plant`s ovules. Outcrossing, on the otherhand, can be defined as a situation where the same species of plantshaving totally different strains fertilizes another plant ofdifferent strains while both are belonging to the same speciesbracket. Its advantages include the assurance that the right fruit orproduct is produced by the same plants(Gurevitch, Scheiner, &ampFox, 2006).

Besides,outsourcing is usually beneficial to plants that grow in hugeplantations. This is because wind pollination can easily occur thuspromoting fertilization and natural development.

Theprincipals of germination occur in this particular system and allowfor the development as mentioned earlier. The principal factors inquestion are extremely vital and include moisture, daylight, and lowtemperatures. The species are in a definite arrangement, Species 1being in the diary row Species 2 in the second row and the species 3in the third row. This arrangement identifies with the firstcharacteristics in the first experiment and treatments.

Thegermination traits being tested in the experiment shows that theSpecies 1 depend on daily light, moisture and cold temperatures andtherefore may likely thrive in a tropical climate setting andenvironment. The germination process of species 2 depends on heat,light, and moisture and may do well in similar condition to species1. The germination conditions of species 3, primarily depend on coldtemperatures, light, and moisture and may likely exist in theMediterranean area of climate.

Thespecies with persistent seed banks would be species 1 and species 3.This is due to the reason that the conditions may be adverse andtherefore the transfer of seeds may be required for the species tosurvive. A squirrel acting as a dispersal agent could probablyprovide a 100metre dispersal distance or more. A bird would probablygive an average of a 500-meter distance in the dispersal of seeds.There are disposal vectors for the above species.

Thedispersal vectors for species 1 would be animal dispersal sincesquirrels would consume 60 of them in an hour for eventual dispersal.The species 2 would probably be dispersed by birds as the birds alsohave a high affinity for these fruits. The species 3 would probablybe wind dispersed since the distance by wind is a mere 10centimeters.

Typicalseed shadow refers to the piece of terrain that is measured in termsof area under which each wind-dispersed seeds fall. The shelter fromprevailing winds is provided by vegetation and other natural covers.As far as migration goes, the outer seed shadow region contains ahigher seed density than its reproductive core region. This outerseed region contains lower seed reproduction and germination ratesdue to harsh condition hence there are fewer species in this regionas compared to the inner core region. On the other hand, potentiallong-distance dispersal occurs over a longer distance from the sourceof the seeds(Gurevitch, Scheiner, &amp Fox, 2006).

Dispersalmechanisms provide more information on the environment in which thespecies is subjected. Species 1 would be able to flourish in aMediterranean climate and adapt pretty well. The species 2 wouldrequire a reduction in temperatures for the plants to developproperly. Species 3 would perfectly fit in a Mediterranean weather.

Metapopulationdynamics defines the outcomes of local species migration as well asthe conditions affecting regional persistence where populations areunstable. The concept embodies the effects of habitat patch area,isolation upon migration and population extinction as its traditionaldefinition. Specialists are enabled to predict movements,distribution similarities, and the general dynamics as part ofcommunities with various species in the natural landscape. It is alsodescribed as a collection of divided populations of similar speciesthat coexist at some level. The species that would exist undermetapopulational dynamics are species 1 and 3. This is because theyhave common characteristics and adaptation to that habitat. Uponclimate fluctuations, species 3 is likely to go extinct. Source-sinkdynamics is used to explain the differences in the quality of ahabitat that would affect population growth. In this theory, thereare various factors in a habitat such as demographic parameter andfactors such as birth, immigration, death and emigration rates. It islikely that the same species that shows source-sink dynamics wouldhave similar metapopulational dynamics since the strength ofsource-sink dynamics within a population depends on the ability of aspecies to grow rapidly and occupy habitat patches, they may exhibithigher or lower quality patches and ability to survive in a stableenvironment. Source-link dynamics would affect the thriving of thespecies 1 since it would have low-quality parts accounting for theweakest organisms that would not survive. The specificcharacteristics of the previous tests would treatments would indicatethat species 3 is a hardy and can survive harsh conditions(Gurevitch, Scheiner, &amp Fox, 2006).


Gurevitch,&nbspJ.,Scheiner,&nbspS.&nbspM., &amp Fox,&nbspG.&nbspA. (2006). Theecology of plants.Sunderland, MA: Sinauer Associates.