Community Development and Persistence in a Low Rocky Intertidal Zone. Jane Lubchenco and Bruce Menge (1978)

Though I had to read through Community Development in a Low Rocky Intertidal Zone, in part or in full, several times before I feel I came to approach understanding, I feel the central idea is one of the more useful ones I’ve yet to read about for Ecological Thought and Practice. In the essay’s introduction the authors state that while communities have several characteristics, it is a mistake to study them as separate phenomena when in reality they are interconnected. In my notes, I wrote the following in order to clarify for myself what I was reading about: “Succession depends on competition (Connell) but also predation (Paine), dispersal rates and reproductive output (Gleason), life histories and persistence (Clements).

I think that due to their more holistic approach Lubchenco and Menge were able to add to ecological thought of the day by confirming and documenting the interactions among the ideas that their predecessors had proven. Though their results stated that “the role of consumers in determining the pattern followed during community development, or succession, seemed of overriding importance” which primarily confirms Paine’s 1966 essay, but predation, they found was largely inversely proportional to wave energy. They also documented, through denudation of patched of the rocks, the importance of dispersal and growth rates in determining which species became dominant, but because their study took place over several years, they were able to show the persistence of the communities and how quickly those patches returned to the state at which they had been before the experiment. This persistence supports Clements theory of a tendency toward climactic climax.

Today in class we were asked whether or not Connell and Paine’s studies contradicted one another, here Lubchenco and Menge showed that at least in some communities, the two ideas are both valid. I thought the reading was helpful in understanding other ideas we’ve already covered in class. The use of so many variables and controls including not only the exclusion of predators but the enclosure of predators were useful in illuminating the authors’ points.

21 thoughts on “Community Development and Persistence in a Low Rocky Intertidal Zone. Jane Lubchenco and Bruce Menge (1978)

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  5. ClearHolidays™

    Your note on “Community Development and Persistence in a Low Rocky Intertidal Zone” provides a clear and comprehensive summary of the essay. Here’s a breakdown of your note:

    1. Introduction and Initial Understanding: You mention that it took several readings for you to approach a full understanding of the essay but highlight the central idea that communities in ecology are interconnected, which is a useful concept.

    2. Holistic Approach: You appreciate the authors, Lubchenco and Menge, for taking a holistic approach to studying communities. You note that their approach confirms and documents interactions among ecological concepts that their predecessors had proven.

    3. Confirmation and Documentation: You point out that the authors’ study results confirm the importance of consumers (predation) in community development, echoing Paine’s work. Additionally, they show the inverse relationship between predation and wave energy, demonstrating the influence of environmental factors.

    4. Importance of Dispersal and Growth Rates: You highlight how the authors documented the significance of dispersal and growth rates in determining species dominance and emphasize the role of persistence in supporting Clements’ theory of climactic climax.

    5. Resolution of Contradictions: You mention that the essay helps resolve the question of whether Connell and Paine’s studies contradict each other, showing that both ideas can be valid in different ecological contexts.

    6. Useful Understanding: You conclude by stating that the reading helped you better understand concepts covered in class and appreciate the authors’ use of variables and controls to illustrate their points effectively.

    Overall, your note provides a thorough and insightful analysis of the essay, showcasing your understanding of the key ecological concepts discussed in the text. Well done!

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