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| Content Provider | Springer Nature Link |
|---|---|
| Author | Orłowski, Grzegorz Czarnecka, Joanna |
| Copyright Year | 2012 |
| Abstract | The endozoochorous dispersal of weed seeds, mediated by birds and without any adaptation to frugivory, has been studied very rarely. We studied the endozoochorous dispersal of viable seeds by the grey partridge Perdix perdix in agricultural landscape. We assessed the content of intact seeds in 609 grey partridge droppings coming from 21 sampling sites in Poland that included three land-cover types (winter cereals, winter oil-seed rape and stubble fields). We found 159 intact seeds of 13 plant species. Most of them are classified as plants without any evolved adaptations to dispersal. The number of intact seeds retrieved from droppings was positively correlated with the proportion of seeds and negatively correlated with total proportion of leaves in the diet. This result may indicate that the consumption of large numbers of seeds increases the possibility that some of them will resist digestion and be excreted with faeces. Our results showed that the highest number of intact seeds recovered from the droppings coming from stubble fields was the consequence of the importance of weed seeds in the diet of grey partridge in this type of land-cover. The grey partridge is a poor seed disperser and rather, it plays an important role as a predator of weed seeds. Neubewertung der Bedeutung des Rebhuhns Perdix perdix als Samenverbreiter von Ackerunkräutern Die Verbreitung von Unkrautsamen, die keine besondere Anpassung an Frugivorie zeigen, mittels der Aufnahme und Ausscheidung durch Vögel wurde bislang nur sehr selten untersucht. Wir untersuchten die Verbreitung keimfähiger Samen—nach der Darmpassage durch Rebhühner Perdix perdix—in der Ackerlandschaft. Wir bestimmten den Gehalt unversehrter Samen in 609 Proben Rebhuhnlosung von 21 Untersuchungsorten in Polen mit einer von drei Formen der Bodenbedeckung (Wintergetreide, Winterraps und Stoppelfelder). Wir fanden 159 intakte Samen von 13 Pflanzenarten. Die meisten von diesen gehörten zu Pflanzen ohne besondere evolutionäre Anpassungen bezüglich der Verbreitung. Die Anzahl unversehrter Samen in der Losung korrelierte positiv mit dem Anteil an Samen und negativ mit dem Anteil an Blättern am Nahrungsspektrum. Diese Ergebnisse könnten darauf hindeuten, dass der Verzehr einer großen Samenmenge die Wahrscheinlichkeit dafür erhöht, dass einige davon die Verdauung überstehen und mit dem Kot ausgeschieden werden. Unsere Ergebnisse zeigten, dass der hohe Anteil unversehrter Samen in der von den Stoppelfeldern stammenden Losung auf der Bedeutung der Unkrautsamen für die Ernährung der Rebhühner in diesem Vegetationstyp beruhte. Rebhühner sind schlechte Samenverbreiter und spielen eher eine wichtige Rolle als Vertilger von Unkrautsamen. |
| Starting Page | 139 |
| Ending Page | 144 |
| Page Count | 6 |
| File Format | |
| ISSN | 21937192 |
| Journal | Journal für Ornithologie |
| Volume Number | 154 |
| Issue Number | 1 |
| e-ISSN | 21937206 |
| Language | English |
| Publisher | Springer-Verlag |
| Publisher Date | 2012-07-24 |
| Publisher Place | Berlin, Heidelberg |
| Access Restriction | Subscribed |
| Subject Keyword | Bird diet Weed seed dispersal Viable seeds Bird droppings Seed predators Unassisted dispersal Zoology Animal Ecology Evolutionary Biology |
| Content Type | Text |
| Resource Type | Article |
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